Analysis of adaptive traffic signal timing tool based out of Houston shows annual operational savings of $578,000

The FHWA performed a comparative analysis on data collected along State Route 6 corridor in Houston before and after the activation of the ACS Lite. Metrics studied included speed, travel time, delay, number of stops and fuel consumption.

METHODOLOGY

• Collect ‘before’ and ‘after’ traffic volume machine counts on State Route 6 (SR 6)–eight intersections
• Perform ‘before’ and ‘after’ floating car travel time and delay studies along SR 6 – eight intersections
• Perform statistical analysis on ‘before’ and ‘after’ traffic volumes, speed and travel time and delay data

FINDINGS

• Total delay, number of stops and fuel consumption all decreased when ACS Lite software was in effect
• There would be an annual savings of $578,000 due to these improvements. 

	Before (per veh)	After (per veh)	Savings (per veh)	Peak Hours (per veh)	Peak Hours Savings
Total Delay (hour)	0.01856	0.01214	0.00642	39.16252	$474
Total Stops	1.7	1.2	0.5	3051.6	$43
Fuel (Liters)	0.490	0.455	0.035	214.837	$128
Peak Hours Benefit	-	-	-	-	$644
Daily Benefit	-	-	-	-	$2,222
Annual Benefit	-	-	-	-	$577,648