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

3.5
3
2.5
2
1.5
1
0.5
0
Railroad crossing
As mentioned before, road maintenance even only at the rail crossing is very essential.
We also recommend: interrupt bus lane in both directions, about 20.0
meters before the crossing and start again 30.0 meters after.
Rail road (Grogol): Kyai Tapa
This stretch is strictly express and problems can be found only on the extremities (Grogol
intersection and the U- turn west>west near railroad crossing) that will be discussed
separately.
The Length is 1.5 km with local and express lanes on each direction, two pedestrian
bridges that correspond to the two proposed busway bus stops. Middle island is wide with
a lot of trees. Side walks are also very wide especially on the north side, where there is
also a secondary local street parallel to the corridor:
Corridor 3 (Harmony – Railroad): Proposed typical section
trafic
w>e
local
Sep Traffic
w>e
express
Island
traffic
e>w
express
Sep Traffic
e>w
local
Sidewalk
(south)
Type Sidewalk
(north)
width 19 8 0.4 8 6 8 0.4 8 6
sum 19 27 27 35.4 41.4 49.4 49.8 57.8 63.8
From the table it can be seen that the corridor on this segment is very wide, and there is
enough space for everything. The only important project option for now is if we can
implement the busway by only using the present road space or shall we widen it.
Directional peak hour future volume is estimated around 5200 pcu, and if adopting the
same value of 420 pcu/m for a very adequate V/C ratio, about 5200/420 = 12.3 meters for
the general traffic will be needed.
Each direction has 8+8+0.4 = 16.4 m (including separator, and if we subtract
3.3 for the bus lane then the remaining space will be 13.1 m or only a little
more than the 12.3 needed.
Therefore, our recommendation is just remove the separator and let the 13.1 meters only
for a 4 lanes road per direction (3.27 meters each lane) and that is the same present
number of lanes, as described below:
Final Recommendations for TransJakarta, p. 122