Speed limits should be 50mph on motorways to cut air pollution levels with no more speed bumps, health watchdog claims

SPEED limits should be 50mph on parts of motorways to cut air pollution, say experts.

Health watchdog Nice also wants speed bumps removed so drivers do not create fumes by constantly braking and accelerating.

IMAGE: Getty Images
Motorways should be limited to 50mph according to leading health watchdog[/caption]

Other suggestions...