Benefit

Evaluation data show that adaptive signal control strategies can improve travel times in comparison to optimized signal timing plans.

Experience developing adaptive signal control software to optimize traffic signal timing.


2 February 2005
Chicago; Illinois; United States; Seattle; Washington; United States; Tucson; Arizona; United States; Reston; Virginia; United States


Summary Information

Field tests were conducted in four cities (Reston, VA, Chicago, IL, Seattle, WA, and Tucson, AZ) to study and apply traffic control systems that operate in real time, adjusting signal timing to accommodate changing traffic patterns. This type of traffic control is known as adaptive signal control. Adaptive signal control software uses detection to interpret traffic approaching a traffic signal, and using mathematical and predictive algorithms, adapts the signal timings accordingly to optimize the performance.

The methodology for the evaluation included laboratory simulations and field tests. The laboratory simulation testing demonstrated that adaptive control algorithms can decrease travel time and improve traffic volumes. Field tests in the four cities supported the simulation testing results.

RESULTS

Simulation results demonstrated that compared to optimized traffic signal timing plans, adaptive control algorithms can decrease travel time and improve traffic volume handling by approximately 3-7 percent.

Field tests performed in Virginia (OPAC) and Washington (RHODES) during high directional flows showed that travel times improved by approximately five percent, verifying simulation results.

In Illinois, the RTACL system dramatically improved travel times by 12-53 percent and decreased delay up to 100 percent along certain corridors within the network.

Benefit Comments

No comments posted to date

Comment on this Benefit

To comment on this summary, fill in the information below and click on submit. An asterisk (*) indicates a required field. Your name and email address, if provided, will not be posted, but are to contact you, if needed to clarify your comments.



Source

Adaptive Control Software

Published By: U.S. DOT Turner-Fairbank Highway Research Center, Office of Operations R&D

Source Date: 2 February 2005

Other Reference Number: Report No. HRTS-04-037, HRDO-03/12-03(500)E)

URL: http://ops.fhwa.dot.gov/publications/adaptivecontrol/

Rating

Average User Rating

0 ( ratings)

Rate this Benefit

(click stars to rate)


Notes

Benefit of the Month for August, 2008 !


Goal Areas

Mobility

Related Metropolitan Integration Links

Link 26: Arterial Management intra-component

Typical Deployment Locations

Metropolitan Areas

Keywords

traffic signals, adaptive signals

Benefit ID: 2008-00509