Guiding Principles Grade-separated Crossings At-grade Pedestrian Crossings Electronic
Audible Traffic
Signal
Smart Device
for the Elderly and
the Disabled
Pilot Real-time
Adaptive Traffic
Signal System

 

Grade-separated crossing constructed above or below a carriageway (i.e. footbridge or subway) is the safest form of crossing which offers uninterrupted walking path and at the same time minimises disruption to vehicular traffic.  It is usually adopted due to heavy vehicle/pedestrian flows or on road safety grounds, such as over an expressway.

footbridge 

subway