Road humps, chicanes, and narrowings are

مطبات الطريق, العقبات, تضييقات الطريق هم

Explanation: Traffic calming measures help keep vehicle speeds low in congested areas where there are pedestrians and children. A pedestrian is much more likely to survive a collision with a vehicle travelling at 20 mph than at 40 mph.

Category: Arabic - Safety and Your Vehicle

References: The Official DVSA Guide to Driving: Section 6, Highway Code: Rule 153