Curb extension

This reduces the crossing distance and allows pedestrians and drivers to see each other when parked vehicles would otherwise block visibility.

Curb extensions are often used in combination with other traffic calming measures such as chicanes, speed bumps, or rumble strips, and are frequently sited to protect formal pedestrian crossings.

In these cases the "squeeze" effect of the narrowed roadway shortens the exposed distance pedestrians must walk.

The study was too small to determine whether other measures of effectiveness were significant, such as percent of pedestrians crossing after a motorist yields.

[8] To facilitate street sweeping, the internal and external curvatures of the extended curb section are moderately graduated.

A curb extension marked by darkened tarmac and black posts
Curb extensions improve visibility of pedestrians.
Curb extensions slow traffic by reducing the turning radius.
Broadway at 33rd Street, Manhattan .