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CBB has worked
continuously since 1991 with the Illinois Department
of Transportation (IDOT) on the statewide signal
coordination and timing (SCAT) project. Each annual
program involves 6 - 8 different signal systems that
are optimized. Extensive data collection is
performed for each corridor including intersection
counts, mainline hose counts and before and after
studies to show reductions in fuel consumption and
pollutant emissions. During implementation, a
series of observations are performed with IDOT
personnel to determine the need for any additional
adjustments to the splits or offsets. This is done
to fine-tune progression and to minimize side street
delay. Field measurements including travel delays
and intersection delays are also performed to show
measures of effectiveness including reduction in
fuel consumption and vehicle emission. A final
report is then prepared detailing the analysis
procedures including a data index summarizing the
intersection delays, travel delays and proposed
signal timing plans.
This program
involves corridor optimization throughout the state.
2001 Projects: Corridor studies were
conducted in Quincy, Springfield - Business Route
55, Springfield - Stevenson Drive, Centralia,
Belleville, Marion, and Metropolis.
2002 Projects: Corridor
studies were conducted in Springfield – Veteran’s
Parkway, Jacksonville, Mount Vernon, Cahokia,
Marion, Effingham, and Lincoln.
2003 Projects: Corridor
studies were conducted in Wabash, Pana, Salem, East
St. Louis, Collinsville, and Marion
2004 Projects: Corridor studies were
conducted in Dirksen, Wabash, Quincy, Mount Vernon,
Columbia, Waterloo, Belleville and Benton |
