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'Red routes' in major cities have been introduced to

A help the traffic flow
Explaination
Traffic jams today are often caused by the volume of traffic. However, inconsiderate parking can lead to the closure of an inside lane or traffic having to wait for oncoming vehicles. Driving slowly in traffic increases fuel consumption and causes a build-up of exhaust fumes.
B raise the speed limits
C provide better parking
D allow lorries to load more freely