<P> In modern traffic planning , passing lanes on freeways are usually designed for through / express traffic , while the lanes furthest from the center of the road have entry / exit ramps . However due to routing constraints , some freeways may have ramps exiting from the passing lane ; these are known as `` left exits '' in North America . </P>
<P> In modern traffic planning , passing lanes on freeways are usually designed for through / express traffic , while the lanes furthest from the center of the road have entry / exit ramps . However due to routing constraints , some freeways may have ramps exiting from the passing lane ; these are known as `` left exits '' in North America . </P>
what is the left lane of a motorway used for
what is the left lane of a motorway used for
passing
passing