benefit-cost analysis presentation

Benefit-Cost Analysis of the SMART SunGuide Operations in Fort Lauderdale, FloridaJune 2006

Steve Corbin District ITS Operations Manager

FDOT District 4

Benefit-Cost Analysis of the SMART SunGuide Operations in Fort Lauderdale, Florida - June 2006

SMART SunGuide TMC

– Manage the operations of Ft. Lauderdale freeway corridors

– 24 hour / 7 day operations

– Manage ITS field device

– Dispatch service patrols and SIRV

– Provide information to 511/ATIS web site

– Coordinate operations with other agencies


Objective

– FDOT D4 evaluates TMC performance annually

– Used performance measures

• Outcome measures

• Output measures, and

• Benefit-cost measures

– Benefit-cost measurement is the subject of this presentation

Benefit-Cost Ratio

2004 2005

Benefit-Cost Ratio 7.86 9.95

Benefit-Cost Ratio (Including Additional Service Patrol Annual Monetary Benefits)

N/A 10.44


Considered Benefits

– Reduction in travel time/delay • Incident duration reduction

• Diversion due to DMS messages

– Reduction in secondary accidents

– Reduction in fatalities due to faster response

– Reduction in fuel consumption

– Reduction in emission

– Driver monitory benefits due to free-of-charge services provided by service patrol


Benefit Calculation methodology

– Based on queuing theory calculations of delay, queue lengths, and total number of vehicles queued

– Analyses performed for seven periods of the week

– Analyses performed for each segment of the three managed corridor • A segment is defined as the directional link between two

interchanges

– Use of IDAS Florida-specific models for emission (NOx, CO, and HC), fuel consumption, and safety

– Highway capacity manual provided capacity under incident and no-incident conditions


Data Sources

– The FDOT District 4 SMART database• Detailed incident statistics

(number, duration, blockage)

• Number of DMS message activations

– Other FDOT databases • AADTs and hourly volume

variations

• Geometry (section length, number of lanes)


Incident Duration Reductions

– Year 2005 Incident durations from SMART database• Shoulder blocking accidents about 49 minutes

• Lane blocking accidents 50 minutes followed by 30 minutes shoulder blockage

– Duration with no ITS deployment• Estimated based on reduction in detection, verification, and

response reported in previous studies

• Shoulder blocking accidents about 67 minutes

• Lane blocking accidents 65 minutes followed by 36 minutes shoulder blockage


No. of Managed Incidents - 2005

Incident Type Number

Shoulder incidents33336

Shoulder accidents 3143

One-lane blockage 1095

Two-lane blockage 512

Three-lane blockage 260

≥ Four-lane blockage 130

Total TMC Recorded Events

40,552

22,798

0 10,000 20,000 30,000 40,000 50,000

2004

2005


Benefits of Diversion

– Assumes that a certain percentage of travelers divert in response the information and get travel time benefits from this diversion.

– Diversion rates with and without traveler information are assumed to be a function of the incident time of day in which the incident occurs and the severity of the incidents


User Monetary Benefits

– Users save money due to services provided by service patrol

– Costs per service for different service types were calculated considering the following:• Flat rate per service

• Tow cost, if needed for the service

• MOT cost, if needed

2005 Road Ranger (RR) Service Patrol Data

118

113

108

111

102

104

106

108

110

112

114

116

118

120

Ave. D

aily

Eve

nts

Ave. D

aily

RR R

espon

ded E

vents

(1)

Ave. D

aily

RR R

eponse

s (2

)

Ave. D

aily

RR A

ctiv

ities

(3)

Qu

anti

ty


Convert Benefits to Dollars

– $13.45 per hour of person travel and $71.05 per hour of truck travel.

– Fuel consumption cost is $2.0 per gallon

– $3,200,000 per fatal crash, $74,730 per injury crash, and $2,000 per PDO crash.

– Dollar values for emission rates are $1,774, $3,731, and $3,889 per/gallon, for HC, NOx, and CO emission (IDAS values)


Obtained Costs

Element Initial ($)* O&M ($)*

TMC 6.7 Million 2.5 Million

DMS/Fiber 11.0 Million 2.3 Million

Road Ranger — 2.5 Million

TIM — 0.31 Million

ATIS Share — 0.175 Million*Costs were obtained from FDOT District 4 database

Note: the cost of 7 CCTV cameras for 0.5 years was added to the above.


Benefit-Cost Results

– Total annual benefit is $86,002,364

– Total annual cost is $8,239,397

– Benefit/cost ratio is 10.44

Benefit-Cost Ratio

2004 2005

Benefit-Cost Ratio 7.86 9.95

Benefit-Cost Ratio (Including Additional Service Patrol Annual Monetary Benefits)

N/A 10.44


Future Effort

– Benefit/cost ratio will be updated annually

– In the near future, additional data and video images will be collected allowing better calibration of parameters

– Enhancements are planned to the procedure developed in this study to make use of the additional collected data

benefit-cost analysis presentation

Business

benefits reduction

shoulder accidents

lane blockage

service tow cost

service mot cost

benefitcost analysis

incident durations

incident conditions