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

TTayal@vhb.com 919-829-0328

BThomas@mbakercorp.com 410-689-3450