InSync's Performance

Lee’s Summit, MO (Kansas City)


Lee's Summit, MO (Missouri Route 291)


Missouri Department of Transportation





Contact Info

Alex Martinez, Transportation Engineer, Missouri DOT Kansas City District or 816.607.2038

Length of Corridor

2.5 miles

Deployment Date

March 2009

InSync Type

InSync standard


Short peak periods occurring when nearby schools are dismissed, new construction, high volume seasonal demands from nearby shopping centers, odd spacing of intersections and random fluctuations in traffic volume

Previous signal management

Coordinated timing plans

One of the most comprehensively studied InSync deployments is the Missouri 
Department of Transportation’s pilot project on Route 291. MoDOT district staff indicated that despite efforts to optimize the fully actuated signal system by frequently retiming it, the corridor remained congested during peak periods. They believed no significant improvements could be made by retiming the signals yet again. MRIGlobal, a leading research institute, performed a rigorous before-and-after study and 86-page report. The results thrilled MoDOT officials both because of the dramatic improvement in traffic conditions and InSync’s ability to eliminate red light running and measurably improve roadway safety.


Daily Benefit Annual Benefit
Vehicle Hours of Travel
364 hours 94,805
Fuel Consumption
131 gallons 34,250 gallons
36,239 stops 9,447,913 stops
Total Economic Benefit $9,407 $2,452,493

Calculations are based on an ADT of 25,779 vehicles and an assumption that the change impacts 70% of the ADT. All calculations are based on normal weekday travel and the results indicate approximate benefits to drivers.



in stops


reduction in
travel time


in delay


in emissions


increase in
average speed


reduction in
fuel usage

Measures  of Effectiveness

Data and Independent Study by



Existing signal timing data collectedNovember 2008; InSync deployed March 2009; InSync results data collected April/May and September 2009. Calculations are based on an ADT of 25,779 vehicles  and an assumption that the change impacts70% of the ADT. All calculations are based on normal weekday travel and the results indicate approximate benefits to drivers.

Download Case Study

Download Independent Study and MOEs


InSync Type

InSync Standard

Detection Type

InSync Video

Cabinet Type


Controller Type


Connection Type

Detector Cards

Hitting All the Greens: Signal systems that react in real time more of a reality

The Federal Highway Administration (FHWA) estimates that more than 75% of the country’s 330,000 traffic signals are operating with outdated or uncoordinated signal-timing plans. Adaptive traffic-control technology holds great promise for reducing congestion on arterial roadways.

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Motorists on Route 291 Discover a New Meaning for ‘Light Speed’

Motorists driving on Route 291 through Lee’s Summit were growing weary at. Stopping. For. Every. Traffic. Light. But now that’s changing.  Thanks to a new signal timing system implemented by MoDOT, drivers along Route 291 between Route 50 and Interstate 470 will see fewer stops, less gas consumption and better travel times.

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Rhythm Engineering traffic system shortens travel time

The Missouri Department of Transportation released a study Thursday by Midwest Research Institute documenting the performance of the artificial-intelligence traffic system, InSync, that Rhythm put in place along Route 291, on 2.5 miles between Missouri Route 50 and Interstate 470.

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New Traffic Signal System Along Lee’s Summit corridor reduces fuel consumption, emissions and commuter travel time

InSync, an artificial intelligence-based technology traffic system, designed, created and installed by Rhythm Engineering, is proving to be the most effective adaptive system in traffic engineering today.

Read More

NBC Action News Coverage (Kansas City, MO)

KCTV5 News Coverage (Kansas City, MO)

Fox 4 News Coverage (Kansas City, MO)

Lee’s Summit, Missouri Corridor Drive

Project Highlight

17% crash reduction

Before we installed InSync, we conducted red light enforcement along 291.After we installed the system, the police department suspended it because there just weren’t enough cars there to run the red light. That is something that I never thought about but I’m really excited to see happen.