Civil Engineering Reference
In-Depth Information
Table 23.7 Recommended values for bus travel times with various stop spacing, dwell times, and
operating environments
A. Base travel time rates/minutes per mile
Average dwell time
Stops per mile
Per stop (s)
2
4
5
6
7
8
9
10
12
10
2.40
3.27
3.77
4.30
4.88
5.53
6.23
7.00
8.75
20
2.73
3.93
4.6
5.3
6.04
6.87
7.73
8.67
10.75
30
3.07
4.6
5.43
6.3
7.2
8.2
9.21
10.33
12.75
40
3.4
5.27
6.26
7.3
8.35
9.53
10.71
12.00
14.75
50
3.74
5.92
7.08
8.3
9.52
10.88
12.21
13.67
16.75
60
4.07
6.58
7.9
9.3
10.67
12.21
13.7
15.33
18.75
B. Additional travel time losses/minutes per mile
Central Business District
Bus lane
no right
turns
Bus lane
with right
turn delays
Bus lanes
blocked by
traffic
Mixed traffic
fl
ow
Typical
1.2
2.0
2.5
-
3.0
3.0
Signal set for buses
0.6
1.4
N/A
N/A
Signals more
frequent than bus
stops
1.7
2.2
2.5
3.0
3.0
4.0
3.5
4.0
-
-
-
-
Arterial Roads Outside of CBD
Bus lane
Mixed traf
c
Typical
0.7
1.2
1.6
Notes
Add values from Part A and Part B to obtain suggested estimate of total bus travel time
Convert total travel time rate to estimated average speed by dividing into 60 to obtain mph.
Interpolation between shown values of dwell time is done on a straight line basis
(
Source
Reference [
12
], TCRP Research Results Digest, No. 38, P 6, Table 4, September 2000.)
Range
0.5
1.0
0.8
-
-
23.5 Major Transit Facility Improvements
Rapid transit facilities play a key role in expanding person carrying capacity and in
providing and maintaining travel mobility in large metropolitan areas. These
include commuter rail, heavy rail, light rail, and bus rapid transit. They are char-
acterized as mainly operating in their own right of way and can they serve com-
muter trips without adding to the street and expressway congestion.
23.5.1 Objectives
The main reasons for building new transit infrastructure systems or improving
existing systems are to enable person mobility and accessibility that is environ-
mentally sustainable in densely populated areas, to provide transportation capacity
