Cost

A SCATS adaptive signal control system costs approximately $28,800 per mile per year.

Experience with Sydney Coordinated Adaptive Traffic Systems (SCATS) in Oakland County, Michigan.


September 2010
M-59 Corridor; Detroit; Michigan; United States


Summary Information

A Sydney Coordinated Adaptive Traffic System (SCATS) was initially deployed at 28 intersections and then expanded through Faster and Safer Travel through Traffic Routing and Advanced Controls (FAST-TRAC) to cover additional intersections in the northern metropolitan area of Detroit, Michigan. The design was intended to use roadside video cameras, computers, and communication networks to monitor traffic conditions and automatically adjust signal timing as needed to reduce vehicle stops, decrease delay, and improve traffic flow. Since the initial deployment, engineers have continued to fine tune its operational parameters to improve traffic conditions and increase safety.

SYSTEM COSTS

Cost data for SCATS and pre-timed signal systems were collected from the Road Commission for Oakland County (RCOC). While computing present worth cost and equivalent annual cost, a discount rate of four percent was considered. Present worth cost, equivalent annual cost and corridor cost per year per mile are presented in the table below as excerpted from the source report (2010).

Attributes
SCATS System
Pre-Timed
Difference in Cost
Initial Cost
$120,000
$100,000
$20,000
Maintenance cost/year
$9,000
$4,000
$5,000
Life
15 years
15 years
15 years
Salvage
0
0
0
Discount Rate
4%
4%
4%
Present Worth of Cost
$220,062
$144,472
$75,590
Cost/Year
$19,788
$12,990
$6,798
Corridor cost/mile/year [1]
$28,789
$19,412
$9,376
[1] = (Cost/year)*number of signals within corridor/Length of corridor in miles
Note: Length of SCATS and Pre-Timed corridors are 6.186 and 8.03 miles respectively.


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Source

Safety Evaluation of SCATS Control System: Final Report

Author: Dutta, Utpal; Deb McAvoy; Jim Lynch; and Laurel Vandeputte

Published By: University of Detroit Mercy

Source Date: September 2010

Other Reference Number: Report No: MIOH UTC TS22p1-2 2010-Final

URL: http://mioh-utc.udmercy.edu/research/ts-04/pdf/MIOH_UTC_TS4_2008-Final_Report_Evaluation_of_SCATS_Control_System.pdf

System Cost

SCATS implementation cost: - $19.8K per mile.
SCATS annual maintenance cost: - $9K per mile.

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Related Unit Cost Subsystems

Roadside Control (RS-C)

Keywords

traffic signals, adaptive signals

Cost ID: 2013-00277