The Most Widely-Deployed Adaptive Traffic Control Signal System in the U.S.

The In|Sync Adaptive Traffic Control System (ATCS) adjusts signal timing and sequencing based on real-time traffic conditions like volume and delay. This advanced traffic management system is compatible with all modern traffic controllers and cabinets, and its patented algorithms can handle virtually all traffic geometries. In|Sync’s optimization strategy is different than other systems because of three components: true digital intersection operations, real-time responses to local intersection demand and the coordination of global corridor movements. This strategy impacts all major traffic engineering measures of effectiveness, including reduction in stops, delay and travel time, while increasing average speed and motorist safety.

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Older ATC Systems Are Based on Last Century’s Technology

Other “Adaptive” Systems Are Solely Responsive

Many other traffic control systems can adjust splits, offsets and cycle lengths in response to traffic data collected over several minutes or cycles and can choose a timing plan based on those past volumes. But these systems cannot detect emerging traffic patterns as they develop, making any timing plan ineffective by the time it is implemented.

Incompatibility Is a Common Problem

Most responsive signal control systems work with only a limited set of controllers, require costly hardware upgrades or are unable to receive adequate data from existing detectors, including many loop detectors and video detection systems — making traffic control difficult.

Different Geometries Frequently Require Entirely Different Systems

Responsive signal control and many advanced traffic management systems handle either grid-network roadway or straight-line arterial geometric layouts. Agencies that want to be able to handle both types of roadway systems have to purchase a separate system for each layout.


Increasing Motorist Safety Through Next-Generation Adaptive Solutions

How have adaptive traffic solutions improved motorist intersection safety over time? From the differences between generations of adaptive solutions to the results of deployed adaptive systems; in this webinar, learn how technological advancements improve motorist safety.

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Why In|Sync

Receive Direct Responses to Traffic Demand

Using integrated detection, In|Sync does more than simply detect vehicle presence; it also assesses volume of vehicles, calculates delay and makes real-time adjustments to phase sequencing to more efficiently serve demand. This second-by-second data allows In|Sync to make instantaneous decisions regarding which phases should have priority, while efficiently serving all phases with demand.

Operate Outside of Fixed Cycles and Sequences

Timing plans are dependent on laborious data collection and analysis, and that time-consuming plan creation can be a challenge for even the most skilled traffic engineers. In|Sync is not dependent on traditional timing plans. While facilitating globally-coordinated movements through a network of intersections, In|Sync’s dynamic optimization algorithms serve traffic based on real-time demand and delay analysis. Because of the system’s flexibility, phases can be re-served between coordinated movements if necessary, and wasted green time is eliminated.

Work with the Most Complicated Intersection Geometries

Enhanced capabilities in the dynamic serving of states allows In|Sync to handle today’s more diverse traffic control geometries, including Texas diamonds, five-approach intersections, crossing corridors and intersections with three-split phase operation.

Define Priority for Each Configuration

In|Sync actively handles Transit Signal Priority requests in a way that both improves transit travel time efficiency and minimizes impact to normal traffic operations. It does this through the ability to choose between several priority strategies that can be applied to a configuration. This allows In|Sync to respond to vehicles in different ways at different times of the day.

Create Corridor Coordination & Compatibility Across Agencies

Busy corridors don’t stop at city limits. In|Sync works on corridors that cross the established boundaries of multiple agencies. Even if different agencies are using different controllers or software platforms, In|Sync can coordinate all intersections in a cross-jurisdictional corridor thanks to its universal compatibility that fuses with existing hardware or software.

Detection Options that Meet Your Intersection Needs

The In|Sync Processor and algorithm works with any of the three camera options available through Rhythm Engineering — including the original In|Sync camera; In|Sync:Thermal, our thermal detection camera; and In|Sync:Fire, a heated-enclosure camera for harsh weather. Along with that, all In|Sync systems can use existing detection devices, such as loops, with the In|Sync:Fusion option.


Transitioning to In|Sync is Easy

Use In|Sync with Existing Hardware

In|Sync complements your existing infrastructure and is compatible with all major brands and types of controllers and cabinets. This seamless integration saves time and money for agencies by using existing equipment without the need to replace, modify or discard.

Utilize Fail Safe Mode

In the event of camera, communication or power failures, In|Sync will never go into transition and the intersection will continue to operate. For detector failures, the In|Sync Processor uses averages of collected historical data to serve traffic. In|Sync’s notification system alerts designated staff about failures via email and/or SMS.

Get 24/7 Operations and Technical Support

In|Sync offers around-the-clock adaptive operations for your transportation network with built-in strategies to keep traffic flowing efficiently, even in adverse conditions.

Deployment and Technical Specs

Learn how to install In|Sync at your intersection and review In|Sync’s detailed technical specs


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Jonathan StevensIn|Sync