InSync's Performance

Topeka, KS

Corridor

Topeka, KS (21st Street)

Agency

City of Topeka, Kansas

Intersections

7

ADT

25,311

Contact Info

Jack Fultz, ITS Supervisor, City of Topeka
jfultz@topeka.org or 785.368.3995

Length of Corridor

1 mile

Deployment Date

February 2011

InSync Type

Standard

Topeka-Map
Challenges

High pedestrian volume and random fluctuations in traffic volume

Previous signal management

Coordinated timing plan 

The City of Topeka used an Energy Efficiency and Conservation Block Grant funded by ARRA (commonly known as the stimulus package) to install adaptive traffic signal systems at 22 intersections. The city chose InSync due to its overall value and its real-time adaptive capabilities. This before-and-after study of 7 InSync intersections along 21st Street shows the city is receiving a tremendous return on its InSync investment in terms of fewer stops, less travel time and fuel and emissions savings. Most importantly, city traffic engineer Linda Voss reported that while there were 141 and 143 crashes on 21st Street the two years before InSync was installed, there were on average 108 crashes the two years after InSync’s deployment, translating into a 24% reduction in accidents.

Benefits

Daily Benefit Annual Benefit
Vehicle Hours of Travel
(reduction)
311 hours 80,944 hours
Fuel Consumption
(decrease)
242 gallons 62,921 gallons
Stops
(eliminated)
26,330 stops 6,845,800 stops
Total Economic Benefit $8,029 $2,087,501

InSync creates the following benefits during peak times on weekdays, which accounts for 24% of the corridor’s volume. Total benefits are likely greater; please contact us for more specifics. Calculations are based on an ADT of 25,311 vehicles using data from PC-Travel and vehicle counts from InSync video detection. All calculations are based on normal weekday travel and the results indicate approximate benefits to drivers.

MOST NOTEWORTHY IMPROVEMENTS

79%

reduction
in stops

43%

reduction in
travel time

68%

reduction
in delay

28%

reduction
in emissions

71%

increase in
average speed

33%

reduction in
fuel usage

Safety improvement

24% reduction in accidents due to InSync (Source: Linda Voss, P.E., City Traffic Engineer for Topeka).

Saving the environment

The U.S. Department of Energy funded Topeka’s InSync deployment and featured the city’s fuel and emissions savings on its national blog.

Measures  of Effectiveness

Data collected by

City of Topeka staff

Dates

Existing signal timing data collected December 2010; InSync deployed February 2011; InSync results data collected March 2011

Download Case Study and MOEs

InSync Type

Standard

Detection Type

InSync cameras

Cabinet Type

332 cabinet

Controller Type

2070 controller

Connection Type

Detector Cards

Green Light Tunnel Followed by Drop in Crashes

The installation of “green light tunnels” along a mile-long stretch of S.W. 21st apparently has helped significantly decrease traffic accidents, says city traffic engineer Linda Voss.

Read More

New Adaptive Traffic Signal System – Topeka, KS


InSync Creates Green Light Tunnels in Topeka, KS
27 News, Topeka

InSync Creates Green Light Tunnels in Topeka, KS Case Study

Project Highlight

24% reduction in accidents due to InSync*

AVAILABLE DOWNLOADS

Download Case Study and MOEs



InSync had the qualifications we wanted: the right price and real-time adaptive traffic control. With InSync, you can, just like it’s advertised, drive the entire corridor on green lights.