I-95 Statewide Corridor Model in North Carolina: Unique Features and Challenges
Presented to
TRB Applications Conference
May 9, 2013
Presented by
Taruna Tayal, Vanasse Hangen Brustlin, Inc.
Bill Thomas, Michael Baker Engineering
I-95 Statewide Corridor Model in NC: Unique Features and Challenges
Purpose of the Model and Unique Features Toll feasibility for I-95 Corridor in the state of North
Carolina Understand travel patterns on I-95 in NC Length of the corridor modeled – 182 miles First study of this magnitude in US Based on trip distance, studied 3 trip patterns for 2-trip
purposes:
Separate diversion calculation application for long-distance and in-corridor trips
• External-External • Passenger Car
• External-Internal • Heavy Vehicle
• Internal-Internal
I-95 Statewide Corridor Model in NC: Unique Features and Challenges
Data Collection
7
8
#
9
10
6
5
4
3
2
1
ALPR data collected at 10 locations• Eight on I-95• One each on:
o I-40 , ando US-64
ALPR data collected and matched for two vehicle class
• Passenger Cars
• Trucks 48-hour tube class counts
collected at each location Travel Time data for I-95 and
US-301 corridor
I-95 Statewide Corridor Model in NC: Unique Features and Challenges
Toll Model
OD Matrices, Networks
Skim Long Distance Network
(toll/no-toll)
Long Distance Diversion
Split OD matrix (Long Distance)
Assign Long Distance matrices
(UE)
Skim Corridor Network
(toll/no-toll)
CorridorDiversion
Split OD matrix (Corridor)
Assign corridor matrices (UE)
Skim congestednetworks
Check for convergence
Summary Statistics
Not converged
TollDiversion
Highway Assignment
Convergence Check& Feedback
Data Prep and Initial Skimming
I-95 Statewide Corridor Model in NC: Unique Features and Challenges
VoT and Model Formulation Truck driver VOT does not
change as a function of distance.
Non-CV VOT increases as distance increases.
Intercity travel VOT is higher than local travel VOT for passenger travelers
Different VOT for :• E-E : PC and Trucks• E –I intercity: PC and Trucks• E –I local: PC• I –I intercity: PC and Trucks• I –I local: PC
Purpose PC ($/hr) Trucks ($/hr)
EE $18.11 $30.13
E-I - Intercity $15.72 $30.13
E-I Local $11.23
I-I - Intercity $12.16 $30.13
I-I Local $8.68
Toll Share = (1 / (1 + eU ))U= a*(Timetoll – Timefree) + b*Cost + CToll + CETC + CCalib
I-95 Statewide Corridor Model in NC: Unique Features and Challenges
$0.00 $10.00 $20.00 $30.00 $40.00 $50.00 $60.00 $70.00 $80.00 $90.00 $100.000.0%
20.0%
40.0%
60.0%
80.0%
100.0%
120.0%Long Distance Diversion Sensitivity
Estimated Data Network Model Less Than 5 Min Saving
Toll Cost over Time Saving ($/hr)
Prob
abili
ty o
f Cho
sing
Tol
l Roa
d
Conclusions/Findings
$0.00 $10.00 $20.00 $30.00 $40.00 $50.00 $60.00 $70.00 $80.00 $90.00 $100.000.0%
20.0%
40.0%
60.0%
80.0%
100.0%
120.0%In-Corridor Diversion Sensitivity
Estimated Data Network Model Less than 5 Min Time Savings
Toll Cost over Time Savings ($/hr)
Prob
abili
ty o
f Cho
osin
g To
ll Ro
ad
I-95 Statewide Corridor Model in NC: Unique Features and Challenges
Conclusions/Findings
SC Border 7N13N
17N
Lumberto
n25N
33N40N
44N49N
55N58N
65N71N
73NDunn
I-40
Smithfield
95N98N
102N106N
116N121N
132N
Rocky M
ount145N
154N168N
173N
VA Border
-10%
0%
10%
20%
30%
40%
50%
60%
70%
80%I-95 Volume Diversion For Varying Toll Values
5 cents/mile toll
12 cents/mile Toll
20 cents/mile toll
25 cents/mile toll
50 cents/mile toll
Toll values in 2009 dollars
I-95 Statewide Corridor Model in NC: Unique Features and Challenges
CONTACT
[email protected] 919-829-0328
[email protected] 410-689-3450