4-1

Model Input

Dollar Value

Dollar value of time Accident costs Fuel costs Emission costs

4-2

Model Input Equipment and Costs

Discount rate

4-3

Model Input Equipment and Costs (Con’t)

Equipment and unit costs for incident management, DMS, and HAR

4-4

Modeling Procedure

Deployment Performance measures and

benefits Costs Benefit/Cost ratio

Overall Structure

4-5

Travel Time Loop over all the analysis

periods Calculate the traffic volume

during the study period Prepare the calculation of

travel time on alternative route

Calculate incident delay and total time savings

Save the performance and benefits for each analysis period

Example of Modeling Procedures

4-6

Safety

Loop over all the analysis periods

Calculate number of fatalities, injuries, PDO

Calculate accident costs Save the performance and

benefits for each analysis

period

Performance Measures and Benefits

4-7

Fuel Consumption

Loop over all the analysis periods

Calculate vehicle miles in queue and fuel consumption in queue

Calculate fuel savings Save the performance and

benefits for each analysis period

Performance Measures and Benefits

4-8

Model Output Summary of Performance

Incident delay in vehicle-hour

Number of accidents Fuel consumption in

gallons

4-9

Model Output Summary of Performance (Con’t)

Emissions in grams Number of road

ranger activities

4-10

Model Output

Summary of Annual Benefits for Each Period

4-11

Model Output Summary of Benefits and Costs

Assessment Elements

Performance modules (emission, fuel consumption, safety, TT)

ITS impacts ITS costs Dollar values of benefits

Time-of-Day Analysis can be conducted using Daily and Time-

of-Day Model The benefits for each analysis time period

calculated separately and summed to produce the total

For peak period models, modules are applied to each period module and the benefits are summed.

For daily models, period-specific multiplication factors utilized to convert the daily link volume to analysis period volumes default factors derived on data from Broward County

state roads.

Performance Measures

Vehicle miles of travel (VMT); Vehicle hours of travel (VHT); Average speed; Number of accidents

Fatality Injury Property damage only

Fuel Consumption (gallons) Monetary benefits to users and/or

agency, as appropriate Emission (gm)

Hydrocarbon Carbon monoxide Oxides of Nitrogen

Benefit Evaluation Methods A method developed for each component

Review and assessment of methods used in evaluation tools

Review of literature Default ITS impact parameters derived

based on a review of previous evaluation studies, USDOT benefit database and the values used in existing ITS sketch planning tools.

The user will be able to change the default ITS impact parameters and perform sensitivity analysis.

ITS Cost The cost information include the number and types of

equipment required for each type of evaluated ITS deployment

The cost information include initial cost, operation and maintenance cost, estimated interest rate, and life time of each equipment

Based on information from ITS agencies collected in a previous FDOT effort and information collected in this study

User can change the defaults and is encouraged to do this based on projects at hand

Dollar Values Travel Time value is 13.45 dollars per person-hour. For

commercial vehicles $71.0 per hour based on TTI study.

$3,200,000 per fatal crash, $74,730 per injury crash, and $3,000 per PDO crash

Fuel Consumption $3 per Gallon

Emission using IDAS defaults -$1,774, $3,731, and $3,889 per gallon, for the HC, NOx, and CO pollutants.

Air Pollution Dollar Values IDAS does not mention the source of the dollar values Pollution impacts human health and causes ecological and

esthetic degradations Review indicates that IDAS values could be conservative

estimates. Thus, they were used in this study.

ITS impact parameters Default ITS impact parameters derived based on a review

of previous evaluation studies, US DOT JPO benefit database and the values used in existing ITS sketch planning tools.

The user will be able to change the default ITS impact parameters and do sensitivity analysis.

Fuel Consumption (Freeways)

Fuel Consumption (Arterials)

Emission Module (CO 2000)

Emission Module (CO 2030)

Comparision of CO emissions in 2030

0

10

20

30

40

50

60

70

80

0 10 20 30 40 50 60 70

Speed (mph)

Em

issi

on

Rat

e(G

ram

s p

er M

ile) Florida

Southeast Florida

IDAS-Mobile5a

IDAS-Emfac

Scrits

Safety Module

IDAS model modified for Florida conditions v/c versus PDO, injury, and fatality

crash rate per MVM

V/C Fatality

Injury PDO

Freeway Auto Arterial AutoFreeway

TruckArterial Truck

Freeway Auto

Arterial AutoFreeway

TruckArterial Truck

0.09

A constant of 0.0004

for freeways

and0.0072 for arterials.

0.5156 1.715 0.5156 1.715 0.8551 2.394 0.8551 2.394  

0.19 0.5156 1.715 0.5156 1.715 0.8551 2.394 0.8551 2.394  

0.29 0.5156 1.715 0.5156 1.715 0.8551 2.394 0.8551 2.394  

0.39 0.5156 1.715 0.5156 1.715 0.8551 2.394 0.8551 2.394  

0.49 0.5156 1.715 0.5156 1.715 0.8551 2.394 0.8551 2.394  

0.59 0.5757 1.715 0.5757 1.715 0.8551 2.394 0.8551 2.394  

0.69 0.5757 1.715 0.5757 1.715 0.8551 2.394 0.8551 2.394  

0.79 0.5757 1.715 0.5757 1.715 0.9953 2.394 0.9953 2.394  

0.89 0.5757 1.715 0.5757 1.715 0.9953 2.394 0.9953 2.394  

0.99 0.7329 1.715 0.7329 1.715 1.1591 2.394 1.1591 2.394  

1.00 0.7329 1.715 0.7642 1.715 1.2737 2.394 1.2737 2.394  

Case Study

Case Study Results

DMS Benefits

Peak PeriodIDAS Method Implemented in FSUTMS

Enhanced Method Implemented in FSUTMS

AM Peak Period $1,010,503 $1,511,443

PM Peak Period $1,552,072 $3,664,827

Off-Peak Period $5,246,229 $1,105,612

Total $7,808,804 $6,281,882