Urban Street and Road Design Guide

Page 187

CHAPTER Intersections

6

3   After leaving the roundabout,

but prior to the pedestrian and cyclist crossings, drivers yield to crossing pedestrians and cyclists in the motorist yield zone. This zone must provide enough room so that the vehicle does not impede the flow of the roundabout, while also ensuring that the vehicle approaches the crossings perpendicularly to maximise visibility of pedestrians and cyclists.

7

5

4   A truck apron (a mountable

outer portion of the central island) only has a modest vertical deflection. This allows trucks, buses, and emergency vehicles to mount it if needed.

4

5   Similar to protected

intersections, corner safety islands are used to separate cyclists from conflicting vehicle movements on the roundabout and provide a high degree of safety and comfort for cyclists.

3

6   Pedestrian crossing islands

ensure that pedestrians only have to cross one direction of traffic at a time, eliminating the need to look in both directions simultaneously, thus reducing the stress of crossing. 7   Raised table crossings with

zebra, paired crossing or signal crossing allow safe crossings without long delays. RECOMMENDED TREATMENTS 1   Before entering the

roundabout and after passing the pedestrian and cyclist crossings, drivers wait in a vehicle storage area for a gap in traffic. The space must balance the need for a smooth entrance onto the roundabout with the need for low speeds.

2   Any vehicles approaching

and leaving the roundabout must be ready to yield to pedestrians and cyclists. Roundabouts are designed to reflect this priority.

For high traffic flows, multilane roundabouts may be required. Additional safety measures are needed for people on foot or bike, such as signal-controlled crossings.   For high or unbalanced flows, entry metering or full signalised roundabouts may be safe and efficient, incorporating signal-controlled crossings.

187


Turn static files into dynamic content formats.

Create a flipbook
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.