Cities Cut Emissions Now Using Existing Traffic Lights

Cities facing pressure to reduce emissions just got a faster path forward that doesn't require billions in new infrastructure or years of waiting.

INRIX has launched a free Green Calculator that shows cities exactly how much pollution comes from cars idling at stoplights and sitting in traffic jams. The tool reveals a surprising truth: a huge chunk of transportation emissions happens when vehicles aren't even moving.

The calculator lets city planners test real scenarios by adjusting variables like signal timing improvements or traffic flow changes. Within minutes, they can see how much cleaner air they could create just by making their existing traffic lights smarter.

Here's what most cities discover when they run the numbers: vehicles stuck at poorly timed intersections waste massive amounts of fuel while pumping out emissions unnecessarily. Cars waiting through multiple light cycles, corridors with uncoordinated signals, and trucks losing time at bottlenecks all add up to dirtier air and frustrated drivers.

The solution isn't building new roads or installing expensive infrastructure. It's making the traffic signals already hanging over every intersection work better together.

INRIX Signals Analytics takes those calculator insights and turns them into action. The system helps cities continuously optimize their traffic lights using real conditions instead of outdated timing plans from decades ago.

When signals work smarter, vehicles spend more time moving and less time idling. Traffic flows more smoothly through coordinated corridors instead of jerking from stop to stop. Cities can focus their efforts on the specific intersections where small timing changes create the biggest air quality improvements.

The Ripple Effect

Beyond cleaner air, optimized signals create wins that ripple through entire communities. Drivers waste less fuel and arrive home less stressed. Smoother traffic flow means fewer accidents at intersections. Cities can use their measurable emissions reductions to strengthen grant applications and sustainability reports.

The approach also gives city leaders something they've desperately needed: proof that their traffic improvements actually reduce pollution. Before and after measurements show exactly how much emissions dropped when signals got smarter.

Boston, Los Angeles, and dozens of other cities are already using this approach to cut emissions without waiting for major construction projects. They're proving that sometimes the fastest path to cleaner air isn't building something new but making what we already have work better.

The infrastructure exists on every corner, waiting to become part of the climate solution.