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

V.3.b. Mitigating Congestion Along Sudirman/Thamrin
Some fairly simple measures could be taken to reduce the level of congestion in the
mixed traffic lanes along Jl. Sudirman and Jl. Thamrin. The current busway in this
section is 4 meters wide, and the mixed traffic lanes are each 4 meters wide also. This is
much wider than is generally necessary. By narrowing the bus lane to 3.5 meters and the
mixed traffic lanes to between 2.86 meters and 3 meters, the Jl. Sudirman/Thamrin
stretch could be expanded to three mixed traffic lanes in each direction instead of only
two in the central part of the carriageway.
There are also bottlenecks at the points along
the road where transition lanes exist between
the higher speed central lanes and the slower
speed local lanes.
This problem could be easily resolved by
simply taking out part of the median and
allowing for a longer transition area, as
below.
V.3.c. The Semanggi Flyover
The current congestion at the Jl. Sudirman/Semanggi Flyover could be resolved by
widening Jl. Sudirman on land available under the flyover.
Final Recommendations for TransJakarta, p. 81