Click on the map to define the origin and destination of your trip.
In addition to the shortest route, two other routes will be shown. The cleanest route is the one over which cumulative exposure to NO2 (in kilometers times parts per billion, km.ppb) would be the lowest. The quietest route is the one over which the least amount of traffic would be encountered. The table below summarizes how each route scores on the different criteria. The traffic measure estimates the number of vehicles encountered along a route.
Additional clicks will extend the route.