Making TransJakarta a World Class BRT System - ITDP | Institute for ...

A lot of u turn different alternatives are available, but all of then could perform better if
sidewalk
50 100 50
buslane
u-turn
u-turn
buslane
Side walk cuts
conversion physical protection
The general concept is to use the same approach already implemented on corridor 1. The
main advantage is avoiding the traffic signals that would introduce a considerable delay
for BRT buses and the general traffic.
On the other hand, at present the U-turns are unprotected from opposite general traffic
and this eventually introduces delays and queues that block the BRT lanes.
To avoid this problem and improve the situation, we suggest a physical protection is
provided, so the U-turn only has conflicts with BRT buses, that at an expected volume of
20 to 30 buses per hour/direction is quite a small conflict compared with the 5000
vehicles (not pcu, just the vehicles) on opposite side.
The sidewalk cuts are to provide an extra second U-turn lane, which can double the
capacity. The U-turn capacity of this solution is estimated by the following graph:
Final Recommendations for TransJakarta, p. 124