Intersection Sight Distance (Left turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (upto 3% approach grade)

30 335 355 355 375 375 400 40035 390 415 415 440 440 465 46540 445 475 475 500 500 530 53045 500 530 530 565 565 600 60050 555 590 590 625 625 665 66555 610 650 650 690 690 730 73060 665 710 710 750 750 795 795

time gap (tg) (in seconds) 7.5 8 8 8.5 8.5 9 9

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadwayIf approach grade exceeds 3%, add 0.2 seconds for each percent gradeIntersection Sight Distance (ISD) = 1.47(speed)(time gap)

Intersection Sight Distance (Left turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (4% approach grade)

30 340 365 365 385 385 410 41035 400 425 425 450 450 475 47540 455 485 485 515 515 545 54545 510 545 545 580 580 610 61050 570 605 605 640 640 680 68055 625 665 665 705 705 745 74560 680 725 725 770 770 815 815

time gap (tg) (in seconds) 7.7 8.2 8.2 8.7 8.7 9.2 9.2

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Left turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (5% approach grade)

30 350 375 375 395 395 415 41535 410 435 435 460 460 485 48540 465 495 495 525 525 555 55545 525 560 560 590 590 625 62550 585 620 620 655 655 695 69555 640 680 680 720 720 760 76060 700 745 745 785 785 830 830

time gap (tg) (in seconds) 7.9 8.4 8.4 8.9 8.9 9.4 9.4

Distances are measured from 14.5' back from intersection

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

Looking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Left turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (6% approach grade)

30 360 380 380 405 405 425 42535 420 445 445 470 470 495 49540 480 510 510 540 540 565 56545 540 570 570 605 605 640 64050 600 635 635 670 670 710 71055 655 700 700 740 740 780 78060 715 760 760 805 805 850 850

time gap (tg) (in seconds) 8.1 8.6 8.6 9.1 9.1 9.6 9.6

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Left turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (7% approach grade)

30 370 390 390 415 415 435 43535 430 455 455 480 480 505 50540 490 520 520 550 550 580 58045 550 585 585 620 620 650 65050 615 650 650 685 685 725 72555 675 715 715 755 755 795 79560 735 780 780 825 825 865 865

time gap (tg) (in seconds) 8.3 8.8 8.8 9.3 9.3 9.8 9.8

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Left turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (8% approach grade)

30 375 400 400 420 420 445 44535 440 465 465 490 490 515 51540 500 530 530 560 560 590 59045 565 600 600 630 630 665 66550 625 665 665 700 700 735 73555 690 730 730 770 770 810 81060 750 795 795 840 840 885 885

time gap (tg) (in seconds) 8.5 9 9 9.5 9.5 10 10

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Left turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (9% approach grade)

30 385 410 410 430 430 450 45035 450 475 475 500 500 525 52540 515 545 545 575 575 600 60045 580 610 610 645 645 675 67550 640 680 680 715 715 750 75055 705 745 745 785 785 825 82560 770 815 815 860 860 900 900

time gap (tg) (in seconds) 8.7 9.2 9.2 9.7 9.7 10.2 10.2

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Left turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (10% approach grade)

30 395 415 415 440 440 460 46035 460 485 485 510 510 540 54040 525 555 555 585 585 615 61545 590 625 625 655 655 690 69050 655 695 695 730 730 765 76555 720 760 760 805 805 845 84560 785 830 830 875 875 920 920

time gap (tg) (in seconds) 8.9 9.4 9.4 9.9 9.9 10.4 10.4

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

Intersection Sight Distance (Right turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (upto 3% approach grade

30 290 310 310 335 335 355 35535 335 365 365 390 390 415 41540 385 415 415 445 445 475 47545 430 465 465 500 500 530 53050 480 515 515 555 555 590 59055 530 570 570 610 610 650 65060 575 620 620 665 665 710 710

time gap (tg) (in seconds) 6.5 7 7 7.5 7.5 8 8

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadwayIf approach grade exceeds 3%, add 0.1 seconds for each percent gradeIntersection Sight Distance (ISD) = 1.47(speed)(time gap)

Intersection Sight Distance (Right turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (4% approach grade)

30 295 315 315 340 340 360 36035 340 370 370 395 395 420 42040 390 420 420 450 450 480 48045 440 470 470 505 505 540 54050 490 525 525 560 560 600 60055 535 575 575 615 615 655 65560 585 630 630 675 675 715 715

time gap (tg) (in seconds) 6.6 7.1 7.1 7.6 7.6 8.1 8.1

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Right turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (5% approach grade)

30 300 320 320 340 340 365 36535 345 375 375 400 400 425 42540 395 425 425 455 455 485 48545 445 480 480 510 510 545 54550 495 530 530 570 570 605 60555 545 585 585 625 625 665 66560 595 640 640 680 680 725 725

time gap (tg) (in seconds) 6.7 7.2 7.2 7.7 7.7 8.2 8.2

Distances are measured from 14.5' back from intersection

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

Looking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Right turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (6% approach grade)

30 300 325 325 345 345 370 37035 350 380 380 405 405 430 43040 400 430 430 460 460 490 49045 450 485 485 520 520 550 55050 500 540 540 575 575 615 61555 550 595 595 635 635 675 67560 600 645 645 690 690 735 735

time gap (tg) (in seconds) 6.8 7.3 7.3 7.8 7.8 8.3 8.3

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Right turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (7% approach grade)

30 305 330 330 350 350 375 37535 360 385 385 410 410 435 43540 410 440 440 465 465 495 49545 460 490 490 525 525 560 56050 510 545 545 585 585 620 62055 560 600 600 640 640 680 68060 610 655 655 700 700 745 745

time gap (tg) (in seconds) 6.9 7.4 7.4 7.9 7.9 8.4 8.4

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Right turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (8% approach grade)

30 310 335 335 355 355 375 37535 365 390 390 415 415 440 44040 415 445 445 475 475 500 50045 465 500 500 530 530 565 56550 515 555 555 590 590 625 62555 570 610 610 650 650 690 69060 620 665 665 710 710 750 750

time gap (tg) (in seconds) 7 7.5 7.5 8 8 8.5 8.5

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Right turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (9% approach grade)

30 315 340 340 360 360 380 38035 370 395 395 420 420 445 44540 420 450 450 480 480 510 51045 470 505 505 540 540 570 57050 525 560 560 600 600 635 63555 575 615 615 655 655 700 70060 630 675 675 715 715 760 760

time gap (tg) (in seconds) 7.1 7.6 7.6 8.1 8.1 8.6 8.6

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

Intersection Sight Distance (Right turn)Design or 85th Percentile Speed Number of Lane (every 10' of median equals 1 lane up to 20')(Miles per hour) (10% approach grade)

30 320 340 340 365 365 385 38535 375 400 400 425 425 450 45040 425 455 455 485 485 515 51545 480 510 510 545 545 580 58050 530 570 570 605 605 640 64055 585 625 625 665 665 705 70560 640 680 680 725 725 770 770

time gap (tg) (in seconds) 7.2 7.7 7.7 8.2 8.2 8.7 8.7

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadway

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

2 (28'-30') 3 (36') 4 (40'-44') 5 (62') 6 (72') 7 (84') 8 (96')

Intersection Sight Distance (Marshall Road)Design or 85th Percentile Speed Approach Grade(Miles per hour) Left Turn Right Turn

4% 6% 4% 6%30 340 360 295 30035 400 420 340 35040 455 480 390 40045 510 540 440 45050 570 600 490 50055 625 655 535 55060 680 715 585 600

time gap (tg) (in seconds) 7.7 8.1 6.6 6.8

Distances are measured from 14.5' back from intersectionLooking left, 5' off the curb/edge of travel lineLooking right, centerline of roadwayIf approach grade exceeds 3%, add 0.2 seconds for each percent gradeIntersection Sight Distance (ISD) = 1.47(speed)(time gap)

K Value Determination Table (Crest Curve, S<L)Stopping Distance (Level Ground)

0%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 21.6 76.720 73.5 38.4 111.925 91.9 60.0 151.930 110.3 86.4 196.635 128.6 117.6 246.240 147.0 153.6 300.645 165.4 194.4 359.750 183.8 240.0 423.755 202.1 290.3 492.560 220.5 345.5 566.065 238.9 405.5 644.470 257.3 470.3 727.675 275.6 539.9 815.580 294.0 614.3 908.3

K Value Determination Table (Crest Curve, S<L)Stopping Distance (1% Downhill)

1%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 22.2 77.320 73.5 39.5 113.025 91.9 61.7 153.530 110.3 88.8 199.135 128.6 120.9 249.540 147.0 157.9 304.945 165.4 199.8 365.250 183.8 246.7 430.455 202.1 298.5 500.660 220.5 355.2 575.765 238.9 416.9 655.870 257.3 483.5 740.775 275.6 555.0 830.680 294.0 631.5 925.5

Stopping Distance (1% Uphill)1%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 21.0 76.120 73.5 37.3 110.825 91.9 58.2 150.130 110.3 83.8 194.135 128.6 114.1 242.740 147.0 149.0 296.045 165.4 188.6 354.050 183.8 232.9 416.6

The material included on this spreadsheet is made available as a tool and not design guidance. The spreadsheets are to be used for reference purposes only and do not supersede the UDC or AASHTO. The data herein shall be used and relied upon only at the user's sole risk, and the user agrees to indemnify and hold harmless Bexar County or the City of San Antonio, its officials and employees from any liability arising out of the use of the data or information provided. If there are any questions about the appropriateness of this data, please call 210/335-6700.

55 202.1 281.8 483.960 220.5 335.4 555.965 238.9 393.6 632.570 257.3 456.5 713.775 275.6 524.0 799.680 294.0 596.2 890.2

K Value Determination Table (Crest Curve, S<L)Stopping Distance (2% Downhill)

2%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 22.9 78.020 73.5 40.7 114.225 91.9 63.5 155.430 110.3 91.5 201.835 128.6 124.6 253.240 147.0 162.7 309.745 165.4 205.9 371.350 183.8 254.2 437.955 202.1 307.6 509.760 220.5 366.0 586.565 238.9 429.6 668.570 257.3 498.2 755.575 275.6 571.9 847.680 294.0 650.8 944.8

Stopping Distance (2% Uphill)2%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 20.4 75.520 73.5 36.2 109.725 91.9 56.6 148.530 110.3 81.6 191.835 128.6 111.0 239.640 147.0 145.0 292.045 165.4 183.5 348.950 183.8 226.6 410.355 202.1 274.1 476.360 220.5 326.2 546.765 238.9 382.9 621.870 257.3 444.1 701.375 275.6 509.8 785.480 294.0 580.0 874.0

K Value Determination Table (Crest Curve, S<L)Stopping Distance (3% Downhill)

3%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 23.6 78.720 73.5 42.0 115.525 91.9 65.5 157.430 110.3 94.4 204.635 128.6 128.5 257.140 147.0 167.8 314.8

45 165.4 212.4 377.850 183.8 262.2 445.955 202.1 317.3 519.460 220.5 377.6 598.165 238.9 443.1 682.070 257.3 513.9 771.275 275.6 589.9 865.680 294.0 671.2 965.2

Stopping Distance (3% Uphill)3%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 19.9 75.020 73.5 35.3 108.825 91.9 55.1 147.030 110.3 79.4 189.735 128.6 108.1 236.740 147.0 141.2 288.245 165.4 178.7 344.050 183.8 220.6 404.355 202.1 266.9 469.060 220.5 317.6 538.165 238.9 372.7 611.670 257.3 432.3 689.575 275.6 496.3 771.980 294.0 564.6 858.6

K Value Determination Table (Crest Curve, S<L)Stopping Distance (4% Downhill)

4%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 24.4 79.520 73.5 43.3 116.825 91.9 67.7 159.630 110.3 97.5 207.735 128.6 132.7 261.340 147.0 173.3 320.345 165.4 219.3 384.750 183.8 270.7 454.555 202.1 327.6 529.760 220.5 389.8 610.365 238.9 457.5 696.470 257.3 530.6 787.975 275.6 609.1 884.780 294.0 693.0 987.0

Stopping Distance (4% Uphill)4%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 19.3 74.520 73.5 34.4 107.925 91.9 53.7 145.630 110.3 77.4 187.635 128.6 105.3 233.940 147.0 137.5 284.5

45 165.4 174.0 339.450 183.8 214.9 398.655 202.1 260.0 462.160 220.5 309.4 529.965 238.9 363.1 602.070 257.3 421.2 678.475 275.6 483.5 759.180 294.0 550.1 844.1

K Value Determination Table (Crest Curve, S<L)Stopping Distance (5% Downhill)

5%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 25.2 80.320 73.5 44.8 118.325 91.9 70.0 161.830 110.3 100.7 211.035 128.6 137.1 265.740 147.0 179.1 326.145 165.4 226.6 392.050 183.8 279.8 463.655 202.1 338.6 540.760 220.5 402.9 623.465 238.9 472.9 711.770 257.3 548.4 805.775 275.6 629.6 905.280 294.0 716.3 1,010.3

Stopping Distance (5% Uphill)5%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 18.9 74.020 73.5 33.5 107.025 91.9 52.4 144.230 110.3 75.4 185.735 128.6 102.6 231.340 147.0 134.1 281.145 165.4 169.7 335.050 183.8 209.5 393.255 202.1 253.5 455.660 220.5 301.6 522.165 238.9 354.0 592.970 257.3 410.6 667.875 275.6 471.3 746.980 294.0 536.2 830.2

K Value Determination Table (Crest Curve, S<L)Stopping Distance (6% Downhill)

6%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 26.1 81.220 73.5 46.3 119.825 91.9 72.4 164.330 110.3 104.2 214.5

35 128.6 141.9 270.540 147.0 185.3 332.345 165.4 234.5 399.950 183.8 289.5 473.355 202.1 350.3 552.560 220.5 416.9 637.465 238.9 489.3 728.270 257.3 567.5 824.775 275.6 651.4 927.180 294.0 741.2 1,035.2

Stopping Distance (6% Uphill)6%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 18.4 73.520 73.5 32.7 106.225 91.9 51.1 143.030 110.3 73.6 183.835 128.6 100.1 228.740 147.0 130.8 277.845 165.4 165.5 330.950 183.8 204.3 388.155 202.1 247.2 449.460 220.5 294.2 514.765 238.9 345.3 584.270 257.3 400.5 657.775 275.6 459.8 735.480 294.0 523.1 817.1

K Value Determination Table (Crest Curve, S<L)Stopping Distance (7% Downhill)

7%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 27.0 82.120 73.5 48.0 121.525 91.9 75.0 166.930 110.3 108.0 218.235 128.6 147.0 275.640 147.0 192.0 339.045 165.4 243.0 408.350 183.8 299.9 483.755 202.1 362.9 565.160 220.5 431.9 652.465 238.9 506.9 745.870 257.3 587.9 845.175 275.6 674.9 950.580 294.0 767.9 1,061.9

Stopping Distance (7% Uphill)7%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 18.0 73.120 73.5 31.9 105.425 91.9 49.9 141.730 110.3 71.8 182.1

35 128.6 97.7 226.440 147.0 127.6 274.645 165.4 161.6 326.950 183.8 199.4 383.255 202.1 241.3 443.560 220.5 287.2 507.765 238.9 337.1 575.970 257.3 390.9 648.275 275.6 448.8 724.480 294.0 510.6 804.6

K Value Determination Table (Crest Curve, S<L)Stopping Distance (8% Downhill)

8%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 28.0 83.120 73.5 49.8 123.325 91.9 77.8 169.730 110.3 112.0 222.335 128.6 152.5 281.140 147.0 199.1 346.145 165.4 252.0 417.450 183.8 311.1 494.955 202.1 376.5 578.660 220.5 448.1 668.665 238.9 525.8 764.770 257.3 609.8 867.175 275.6 700.1 975.780 294.0 796.5 1,090.5

Stopping Distance (8% Uphill)8%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 17.5 72.720 73.5 31.2 104.725 91.9 48.7 140.630 110.3 70.1 180.435 128.6 95.4 224.140 147.0 124.7 271.745 165.4 157.8 323.150 183.8 194.8 378.555 202.1 235.7 437.860 220.5 280.5 501.065 238.9 329.2 568.170 257.3 381.8 639.075 275.6 438.3 713.980 294.0 498.6 792.6

K Value Determination Table (Crest Curve, S<L)Stopping Distance (9% Downhill)

9%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 29.1 84.220 73.5 51.7 125.2

25 91.9 80.8 172.730 110.3 116.4 226.635 128.6 158.4 287.040 147.0 206.9 353.945 165.4 261.8 427.250 183.8 323.2 507.055 202.1 391.1 593.260 220.5 465.4 685.965 238.9 546.2 785.170 257.3 633.5 890.875 275.6 727.2 1,002.980 294.0 827.4 1,121.4

Stopping Distance (9% Uphill)9%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 17.1 72.320 73.5 30.5 104.025 91.9 47.6 139.530 110.3 68.5 178.835 128.6 93.3 221.940 147.0 121.8 268.845 165.4 154.2 319.550 183.8 190.3 374.155 202.1 230.3 432.460 220.5 274.1 494.665 238.9 321.7 560.570 257.3 373.1 630.375 275.6 428.3 703.980 294.0 487.3 781.3

K Value Determination Table (Crest Curve, S<L)Stopping Distance (10% Downhill)

10%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 30.3 85.420 73.5 53.8 127.325 91.9 84.1 175.930 110.3 121.1 231.335 128.6 164.8 293.440 147.0 215.2 362.245 165.4 272.4 437.750 183.8 336.3 520.055 202.1 406.9 609.060 220.5 484.2 704.765 238.9 568.3 807.170 257.3 659.1 916.375 275.6 756.6 1,032.280 294.0 860.8 1,154.8

Stopping Distance (10% Uphill)10%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 16.7 71.920 73.5 29.8 103.3

25 91.9 46.5 138.430 110.3 67.0 177.235 128.6 91.2 219.840 147.0 119.1 266.145 165.4 150.7 316.150 183.8 186.1 369.855 202.1 225.2 427.360 220.5 268.0 488.565 238.9 314.5 553.470 257.3 364.7 622.075 275.6 418.7 694.380 294.0 476.4 770.4

K Value Determination Table (Crest Curve, S<L)Stopping Distance (11% Downhill)

11%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 31.5 86.720 73.5 56.1 129.625 91.9 87.6 179.530 110.3 126.1 236.435 128.6 171.7 300.340 147.0 224.3 371.345 165.4 283.8 449.250 183.8 350.4 534.155 202.1 424.0 626.160 220.5 504.6 725.165 238.9 592.2 831.070 257.3 686.8 944.075 275.6 788.4 1,064.080 294.0 897.0 1,191.0

Stopping Distance (11% Uphill)11%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 16.4 71.520 73.5 29.1 102.625 91.9 45.5 137.430 110.3 65.5 175.835 128.6 89.2 217.840 147.0 116.5 263.545 165.4 147.4 312.850 183.8 182.0 365.855 202.1 220.2 422.460 220.5 262.1 482.665 238.9 307.6 546.570 257.3 356.8 614.075 275.6 409.5 685.280 294.0 466.0 760.0

K Value Determination Table (Crest Curve, S<L)Stopping Distance (12% Downhill)

12%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 32.9 88.020 73.5 58.5 132.025 91.9 91.4 183.330 110.3 131.7 241.935 128.6 179.2 307.940 147.0 234.1 381.145 165.4 296.3 461.750 183.8 365.8 549.555 202.1 442.6 644.760 220.5 526.7 747.265 238.9 618.2 857.070 257.3 716.9 974.275 275.6 823.0 1,098.680 294.0 936.4 1,230.4

Stopping Distance (12% Uphill)12%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 16.0 71.220 73.5 28.5 102.025 91.9 44.5 136.430 110.3 64.1 174.435 128.6 87.3 215.940 147.0 114.0 261.045 165.4 144.3 309.750 183.8 178.1 361.955 202.1 215.5 417.760 220.5 256.5 477.065 238.9 301.0 539.970 257.3 349.1 606.475 275.6 400.8 676.480 294.0 456.0 750.0

K Value Determination Table (Crest Curve, S<L)Stopping Distance (13% Downhill)

13%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 34.4 89.620 73.5 61.2 134.725 91.9 95.6 187.530 110.3 137.7 248.035 128.6 187.5 316.140 147.0 244.8 391.845 165.4 309.9 475.350 183.8 382.6 566.355 202.1 462.9 665.060 220.5 550.9 771.465 238.9 646.5 885.470 257.3 749.8 1,007.175 275.6 860.8 1,136.480 294.0 979.4 1,273.4

Stopping Distance (13% Uphill)13%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 15.7 70.820 73.5 27.9 101.425 91.9 43.6 135.530 110.3 62.8 173.035 128.6 85.5 214.140 147.0 111.6 258.645 165.4 141.3 306.650 183.8 174.4 358.255 202.1 211.0 413.260 220.5 251.1 471.665 238.9 294.7 533.670 257.3 341.8 599.175 275.6 392.4 668.080 294.0 446.5 740.5

K Value Determination Table (Crest Curve, S<L)Stopping Distance (14% Downhill)

14%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 36.1 91.220 73.5 64.2 137.725 91.9 100.2 192.130 110.3 144.4 254.635 128.6 196.5 325.140 147.0 256.6 403.645 165.4 324.8 490.250 183.8 401.0 584.755 202.1 485.2 687.360 220.5 577.4 797.965 238.9 677.6 916.570 257.3 785.9 1,043.275 275.6 902.2 1,177.880 294.0 1026.5 1,320.5

Stopping Distance (14% Uphill)14%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 15.4 70.520 73.5 27.3 100.825 91.9 42.7 134.630 110.3 61.5 171.735 128.6 83.7 212.340 147.0 109.3 256.345 165.4 138.4 303.750 183.8 170.8 354.655 202.1 206.7 408.860 220.5 246.0 466.565 238.9 288.7 527.670 257.3 334.8 592.175 275.6 384.4 660.080 294.0 437.3 731.3

K Value Determination Table (Crest Curve, S<L)Stopping Distance (15% Downhill)

15%Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance

15 55.1 37.9 93.020 73.5 67.4 140.925 91.9 105.3 197.230 110.3 151.6 261.935 128.6 206.4 335.040 147.0 269.6 416.645 165.4 341.2 506.650 183.8 421.2 605.055 202.1 509.7 711.860 220.5 606.6 827.165 238.9 711.9 950.870 257.3 825.6 1,082.975 275.6 947.8 1,223.480 294.0 1078.4 1,372.4

Stopping Distance (15% Uphill)15%

Design Speed (mph) Brake Reaction Distance (ft) Braking Distance (ft) Total Distance15 55.1 15.1 70.220 73.5 26.8 100.325 91.9 41.8 133.730 110.3 60.3 170.535 128.6 82.0 210.640 147.0 107.1 254.145 165.4 135.6 301.050 183.8 167.4 351.155 202.1 202.5 404.760 220.5 241.0 461.565 238.9 282.9 521.870 257.3 328.1 585.375 275.6 376.6 652.380 294.0 428.5 722.5

K Value Determination Table (Crest Curve, S<L)Stopping Distance (Level Ground)

Design Distance (S) Calculated K Design K80 3.0 3

115 6.1 7155 11.1 12200 18.5 19250 29.0 29305 43.1 44360 60.1 61425 83.7 84495 113.5 114570 150.6 151645 192.8 193730 246.9 247820 311.6 312910 383.7 384

K Value Determination Table (Crest Curve, S<L)Stopping Distance (1% Downhill)

Design Distance (S) Calculated K Design K80 3.0 3

115 6.1 7155 11.1 12200 18.5 19250 29.0 29305 43.1 44370 63.4 64435 87.7 88505 118.2 119580 155.9 156660 201.9 202745 257.2 258835 323.1 324930 400.8 401

Stopping Distance (1% Uphill)

Design Distance (S) Calculated K Design K80 3.0 3

115 6.1 7155 11.1 12195 17.6 18245 27.8 28300 41.7 42355 58.4 59420 81.7 82

The material included on this spreadsheet is made available as a tool and not design guidance. The spreadsheets are to be used for reference purposes only and do not supersede the UDC or AASHTO. The data herein shall be used and relied upon only at the user's sole risk, and the user agrees to indemnify and hold harmless Bexar County or the City of San Antonio, its officials and employees from any liability arising out of the use of the data or information provided. If there are any questions about the appropriateness of this data, please call 210/335-6700.

485 109.0 110560 145.3 146635 186.9 187715 236.9 237800 296.6 297895 371.2 372

K Value Determination Table (Crest Curve, S<L)Stopping Distance (2% Downhill)

Design Distance (S) Calculated K Design K80 3.0 3

115 6.1 7160 11.9 12205 19.5 20255 30.1 31310 44.5 45375 65.2 66440 89.7 90510 120.5 121590 161.3 162670 208.0 209760 267.7 268850 334.8 335945 413.8 414

Stopping Distance (2% Uphill)

Design Distance (S) Calculated K Design K80 3.0 3

110 5.6 6150 10.4 11195 17.6 18240 26.7 27295 40.3 41350 56.8 57415 79.8 80480 106.8 107550 140.2 141625 181.0 182705 230.3 231790 289.2 290875 354.8 355

K Value Determination Table (Crest Curve, S<L)Stopping Distance (3% Downhill)

Design Distance (S) Calculated K Design K80 3.0 3

120 6.7 7160 11.9 12205 19.5 20260 31.3 32315 46.0 46

380 66.9 67450 93.8 94520 125.3 126600 166.8 167685 217.4 218775 278.3 279870 350.7 351970 436.0 437

Stopping Distance (3% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

110 5.6 6150 10.4 11190 16.7 17240 26.7 27290 39.0 39345 55.2 56405 76.0 77470 102.4 103540 135.1 136615 175.3 176690 220.6 221775 278.3 279860 342.7 343

K Value Determination Table (Crest Curve, S<L)Stopping Distance (4% Downhill)

Design Distance (S) Calculated K Design K80 3.0 3

120 6.7 7160 11.9 12210 20.4 21265 32.5 33325 48.9 49385 68.7 69455 95.9 96530 130.2 131615 175.3 176700 227.1 228790 289.2 290885 362.9 363990 454.2 455

Stopping Distance (4% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

110 5.6 6150 10.4 11190 16.7 17235 25.6 26285 37.6 38

340 53.6 54400 74.1 75465 100.2 101530 130.2 131605 169.6 170680 214.3 215760 267.7 268845 330.9 331

K Value Determination Table (Crest Curve, S<L)Stopping Distance (5% Downhill)

Design Distance (S) Calculated K Design K85 3.3 4

120 6.7 7165 12.6 13215 21.4 22270 33.8 34330 50.5 51395 72.3 73465 100.2 101545 137.6 138625 181.0 182715 236.9 237810 304.0 305910 383.7 384

1,015 477.4 478

Stopping Distance (5% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

110 5.6 6145 9.7 10190 16.7 17235 25.6 26285 37.6 38340 53.6 54395 72.3 73460 98.1 99525 127.7 128595 164.1 165670 208.0 209750 260.7 261835 323.1 324

K Value Determination Table (Crest Curve, S<L)Stopping Distance (6% Downhill)

Design Distance (S) Calculated K Design K85 3.3 4

120 6.7 7165 12.6 13215 21.4 22

275 35.0 36335 52.0 53400 74.1 75475 104.6 105555 142.7 143640 189.8 190730 246.9 247825 315.4 316930 400.8 401

1,040 501.2 502

Stopping Distance (6% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

110 5.6 6145 9.7 10185 15.9 16230 24.5 25280 36.3 37335 52.0 53390 70.5 71450 93.8 94515 122.9 123585 158.6 159660 201.9 202740 253.8 254820 311.6 312

K Value Determination Table (Crest Curve, S<L)Stopping Distance (7% Downhill)

Design Distance (S) Calculated K Design K85 3.3 4

125 7.2 8170 13.4 14220 22.4 23280 36.3 37340 53.6 54410 77.9 78485 109.0 110570 150.6 151655 198.8 199750 260.7 261850 334.8 335955 422.6 423

1,065 525.6 526

Stopping Distance (7% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

110 5.6 6145 9.7 10185 15.9 16

230 24.5 25275 35.0 36330 50.5 51385 68.7 69445 91.8 92510 120.5 121580 155.9 156650 195.8 196725 243.6 244805 300.3 301

K Value Determination Table (Crest Curve, S<L)Stopping Distance (8% Downhill)

Design Distance (S) Calculated K Design K85 3.3 4

125 7.2 8170 13.4 14225 23.5 24285 37.6 38350 56.8 57420 81.7 82495 113.5 114580 155.9 156670 208.0 209765 271.2 272870 350.7 351980 445.0 446

1,095 555.6 556

Stopping Distance (8% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

105 5.1 6145 9.7 10185 15.9 16225 23.5 24275 35.0 36325 48.9 49380 66.9 67440 89.7 90505 118.2 119570 150.6 151640 189.8 190715 236.9 237795 292.9 293

K Value Determination Table (Crest Curve, S<L)Stopping Distance (9% Downhill)

Design Distance (S) Calculated K Design K85 3.3 4

130 7.8 8

175 14.2 15230 24.5 25290 39.0 39355 58.4 59430 85.7 86510 120.5 121595 164.1 165690 220.6 221790 289.2 290895 371.2 372

1,005 468.0 4691,125 586.5 587

Stopping Distance (9% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

105 5.1 6140 9.1 10180 15.0 16225 23.5 24270 33.8 34320 47.5 48375 65.2 66435 87.7 88495 113.5 114565 147.9 148635 186.9 187705 230.3 231785 285.6 286

K Value Determination Table (Crest Curve, S<L)Stopping Distance (10% Downhill)

Design Distance (S) Calculated K Design K90 3.8 4

130 7.8 8180 15.0 16235 25.6 26295 40.3 41365 61.7 62440 89.7 90525 127.7 128610 172.4 173705 230.3 231810 304.0 305920 392.2 393

1,035 496.4 4971,155 618.2 619

Stopping Distance (10% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

105 5.1 6

140 9.1 10180 15.0 16220 22.4 23270 33.8 34320 47.5 48370 63.4 64430 85.7 86490 111.3 112555 142.7 143625 181.0 182695 223.8 224775 278.3 279

K Value Determination Table (Crest Curve, S<L)Stopping Distance (11% Downhill)

Design Distance (S) Calculated K Design K90 3.8 4

130 7.8 8180 15.0 16240 26.7 27305 43.1 44375 65.2 66450 93.8 94535 132.6 133630 183.9 184730 246.9 247835 323.1 324945 413.8 414

1,065 525.6 5261,195 661.7 662

Stopping Distance (11% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

105 5.1 6140 9.1 10180 15.0 16220 22.4 23265 32.5 33315 46.0 46370 63.4 64425 83.7 84485 109.0 110550 140.2 141615 175.3 176690 220.6 221760 267.7 268

K Value Determination Table (Crest Curve, S<L)Stopping Distance (12% Downhill)

Design Distance (S) Calculated K Design K

90 3.8 4135 8.4 9185 15.9 16245 27.8 28310 44.5 45385 68.7 69465 100.2 101550 140.2 141645 192.8 193750 260.7 261860 342.7 343975 440.5 441

1,100 560.7 5611,235 706.8 707

Stopping Distance (12% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

105 5.1 6140 9.1 10175 14.2 15220 22.4 23265 32.5 33310 44.5 45365 61.7 62420 81.7 82480 106.8 107540 135.1 136610 172.4 173680 214.3 215755 264.1 265

K Value Determination Table (Crest Curve, S<L)Stopping Distance (13% Downhill)

Design Distance (S) Calculated K Design K90 3.8 4

135 8.4 9190 16.7 17250 29.0 29320 47.5 48395 72.3 73480 106.8 107570 150.6 151670 208.0 209775 278.3 279890 367.1 368

1,010 472.7 4731,140 602.2 6031,275 753.3 754

Stopping Distance (13% Uphill)

Design Distance (S) Calculated K Design K

75 2.6 3105 5.1 6140 9.1 10175 14.2 15215 21.4 22260 31.3 32310 44.5 45360 60.1 61415 79.8 80475 104.6 105535 132.6 133600 166.8 167670 208.0 209745 257.2 258

K Value Determination Table (Crest Curve, S<L)Stopping Distance (14% Downhill)

Design Distance (S) Calculated K Design K95 4.2 5

140 9.1 10195 17.6 18255 30.1 31330 50.5 51405 76.0 77495 113.5 114585 158.6 159690 220.6 221800 296.6 297920 392.2 393

1,045 506.0 5071,180 645.2 6461,325 813.5 814

Stopping Distance (14% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

105 5.1 6135 8.4 9175 14.2 15215 21.4 22260 31.3 32305 43.1 44355 58.4 59410 77.9 78470 102.4 103530 130.2 131595 164.1 165660 201.9 202735 250.3 251

K Value Determination Table (Crest Curve, S<L)Stopping Distance (15% Downhill)

Design Distance (S) Calculated K Design K95 4.2 5

145 9.7 10200 18.5 19265 32.5 33340 53.6 54420 81.7 82510 120.5 121605 169.6 170715 236.9 237830 319.2 320955 422.6 423

1,085 545.5 5461,225 695.4 6961,375 876.1 877

Stopping Distance (15% Uphill)

Design Distance (S) Calculated K Design K75 2.6 3

105 5.1 6135 8.4 9175 14.2 15215 21.4 22255 30.1 31305 43.1 44355 58.4 59405 76.0 77465 100.2 101525 127.7 128590 161.3 162655 198.8 199725 243.6 244

Calculated Speed in a Horizontal Curve for a Given RadiusFor Design Speeds between 35 and 50 MPH

40 Calculated Safe Design Speed (MPH)700 Horizonal Radius (Ft)

2.00% Pavement Cross Slope

For Design Speeds between 25 and 30 MPH21 Calculated Safe Design Speed (MPH)

157 Horizonal Radius (Ft)2.00% Pavement Cross Slope

For Design Speeds <= 20 MPH13 Calculated Safe Design Speed (MPH)50 Horizonal Radius (Ft)

2.00% Pavement Cross Slope

Minimum Horizontal Radius for Design SpeedFor Design Speeds between 35 and 50 MPH

544 Calculated Minimum Radius (ft)35 Design Speed (MPH)

2.00% Pavement Cross Slope

For Design Speeds between 25 and 30 MPH333 Calculated Minimum Radius (ft)

30 Design Speed (MPH)2.00% Pavement Cross Slope

For Design Speeds <= 20 MPH127 Calculated Minimum Radius (ft)

20 Design Speed (MPH)2.00% Pavement Cross Slope

Horizontal Curve Offset Distance Calculation SheetEnter Design Speed: 21 MPH

Enter Slope (most restrictive): 6.15% (positive value only) (Most restrictive value would be the largest downhill or smallest uphill value)Enter Horizontal Curve Radius: 136 ft

Stopping Sight Distance Downhill: 130 ftStopping Sight Distance Uphill: 115 ft

Sight Distance Offset (Downhill): 15 ft (Measured at Center of PC/PT of Curve)Sight Distance Offset (Uphill): 12 ft (Measured at Center of PC/PT of Curve)

Horizontal Curve Offset Distance Calculation Sheet

(Most restrictive value would be the largest downhill or smallest uphill value)

Intersection Sight Distance Calculator(Minor onto Major Street -- Stop Condition)

Stree Address: Plat:

Major Cross Street: Marbach RoadMinor Cross Street: Just My Style

Major Street Design Speed: 45 mphNumber of Lanes Heading Right (may include turn lanes)*: 3 lane(s)

Number of Lanes Heading Left: 2 lane(s) * -- If left turn lane is within median, do not countWidth of Median to the Left (in feet): 14 feet

Width of Median to the Right (in feet): 0 feet Minor Street Approach Grade: 0.5 %

Results for Approach Grade: 0.5 %Calcuated Intersection Sight Distance (right turn): 463.05 feet

Design Intersection Sight Distance (right turn): 465 feet

Calcuated Intersection Sight Distance (crossing): 562.275 feetDesign Intersection Sight Distance (crossing): 565 feet

Calcuated Intersection Sight Distance (left turn with right w/I 175'): 628.425 feetDesign Intersection Sight Distance (left turn with right w/I 175'): 630 feet

Calcuated Intersection Sight Distance (left turn without right w/I 175'): 595.35 feetDesign Intersection Sight Distance (left turn without right w/I 175'): 600 feet

* -- When a Two-Way Left Turn Lane is present, add one lane to the number of lanes heading right only.

Locating The Points of the Sight Distance TriangleHorizontal

Looking Left, measure 6.5 feet off of the nearest curb or edge of travel lane (does not include shoulder).

Vertical

Clear Vision within the Sight Distance Triangle

The orgin from which distances are measured is located at 14.5' back from curb or pavement line of Major street and 6.5' from nearest curb of Minor Street.

Looking Right if right turn is within 175', measure to the center of the fartherst travel lane travelling to the left (does not include shoulder).

Looking Right if right turn is not within 175', measure to the nearest travel lane travelling to the left (does not include shoulder).

The driver's eye is 3.5 ft above the road surface and the object to be seen is 3.5 ft (driver's eye height for the approaching vehicle) above the surface of the intersecting road. Although the average vehicle height is 4.35 ft, 3.5 ft is used to ensure that driver of each vehicle can see the other vehicle.

Clear vision areas must be free of visual obstructions (e.g., structures, walls, fences and vegetation which are higher than three (3) feet and lower than eight (8) feet above the street pavement.

* -- If left turn lane is within median, do not count

Time Gap Calculation7 sec0 sec7 sec Right

8.5 sec0 sec

8.5 sec Crossing9.5 sec

0 sec9.5 sec Left with right turn within 175'

9 sec0 sec9 sec Left without right turn within 175'