2. Bangerter Hwy & SR-201 DDIBenefits: Reduced total delay
and stops by 41% Improve 2020 LOS from E to C (WB ramps) Utilized
existing structure vs. full reconstruct Improved safety (reduced
conflict points) Cost effective solution Bangerter Hwy & SR-201
($2.8M) 3. Bangerter Hwy & SR-201 DDIDesign Considerations:
Design Speed: 10 mph less through DDI Bangerter Hwy = 50 mph, DDI =
40 mph Low speed urban used Cross Angle: 30 degree (minimum) 30
degrees Ramp/ Crossover Spacing: adequate forstorage 824 feet Lane
Width: turning radiusSource: UDOT DDI Guidelines 4. Bangerter Hwy
& SR-201 DDIOperational Analysis Guidelines: DDI fails if PHV
(A,B,C) is > 2100 vph (4 thrulanes) A= 550 vph, B= 1400 vph, C=
2800 vph (3 turn lanes,5 thru lanes) Sum of 2 of 3 not exceed 1900
vph (4 thru lanes) LOS C (not typical D/E) 2020 No Build LOS E (LOS
F NBL, SBT), PI = 299 2020 Build LOS C (No LOS F), PI = 175 5. DDI
Signal Guidelines Combined Signal Pole & Mast Arm Directional
Arrows Right Turn Signal Detection Cable 6. DDI Signing
GuidelinesSource: UDOT DDI Guidelines Directional Arrow Sign by
Signal Head Sign clutter Critical Signs Only Powder Coat back of
Signal Heads 7. DDI Striping Guidelines Directional Arrow at Stop
Bar Dotted Lines throughCrossover Grooved in PavementMarkings in
Concrete/Reduced Maintenance 8. Bangerter Hwy & SR-201
DDIBangerter Hwy & SR-201, UtahI-44 & SR 13 in Springfield,
Missouri 9. DDI Glare Screen Guidelines 10. Bangerter Hwy &
SR-201 DDILessons Learned:Design Issues: Signing & Striping:
Cross slope Reduce sign clutter critical only Vertical/ horizontal
curves Lane width/turning movement Low speed urban design radii
Pedestrians Dotted lines through crossover Glare screens vs. sight
distance Directional Arrow at Stop Bar 11. Bangerter Hwy &
SR-201 DDILessons Learned: Signal: One signal pole / mast arm
Directional arrow sign by signal head 12. Bangerter Hwy &
SR-201 DDILessons Learned: Construction:Maintenance: MOT Grooved in
pavement markings Public Education Snow removal Installation of
Curb painting / glare screen detection cablerepair Signal timing
simulate 13. Bangerter Hwy & SR-201 DDI 14. Bangerter Hwy &
SR-201QUESTIONS?
