Civil Engineering Reference
In-Depth Information
21.2.2 Speci
c Actions
Table
21.2
shows the vehicle trip reduction results obtained for various types of
alternative transportation services provided by employers under different travel
conditions.
Although the sample size generally is too small to be statistically signi
cant, the
table provides anecdotal data that shows reductions in vehicle trips of varying
magnitudes. For example,
The highest impact on trip reduction (36.6 %) was achieved where parking fees
were implemented jointly with
“
company vehicles
”
And where they were implemented
jointly
with Vanpool services,
the trip
reduction increased to 23.6 %
Table 21.2 Vehicle trip reduction (VTR) percentages related to transportation services provided
by employers
Other
condition
VTR by level of overall employer support (sample size)
Transit
Vanpool
Transit and
vanpool
Company
vehicles
All with
services
No services
All
18.9 % (4)
21.3 % (11)
18.8 % (11)
24.6 % (11)
21.6 % (34)
13.6 % (48)
Transit availability
High
35.3 % (2)
24.4 % (4)
27.2 % (3)
33.5 % (2)
28.8 % (11)
23.6 % (13)
Medium
14.1 % (1)
25.6 % (1)
12.6 % (1)
15.0 % (3)
21.0 % (6)
8.0 % (13)
Low
<0 (1)
18.6 % (6)
16.1 % (7)
21.8 % (6)
15.5 % (17)
11.1 % (22)
Restricted parking
Yes
35.3 % (2)
28.4 % (6)
23.1 % (5)
20.7 % (5)
27.9 % (17)
20.3 % (19)
No
2.6 % (2)
12.8 % (5)
15.2 % (6)
17.2 % (6)
15.4 % (17)
9.3 % (29)
Parking fees
Yes
35.3 % (2)
34.1 % (5)
23.6 % (4)
36.6 % (5)
31.4 % (15)
18.2 % (16)
No
2.6 % (2)
10.7 % (6)
16.1 % (7)
14.6 % (6)
13.9 % (19)
11.3 % (32)
Level of support
High
n/a (0)
21.7 % (6)
25.6 % (5)
33.5 % (6)*
26.5 % (15)
12.4 % (17)
Medium
15.8 % (3)
12.8 % (2)
12.9 % (5)
14.0 % (5)*
15.5 % (14)
16.2 % (19)
Low
28.2 % (1)
26.3 % (3)
14.1 % (1)
n/a (0)
24.2 % (5)
11.2 % (12)
Modal subsidies
Yes
28.2 % (3)
25.4 % (9)
25.4 % (7)
30.8 % (8)*
26.7 % (24)
14.7 % (40)
No
0.0 % (1)
13.4 % (3)
7.3 % (4)
8.3 % (3)*
9.4 % (10)
6.0 % (8)
Telecommuting
Yes
28.2 % (1)
9.6 % (2)
14.5 % (3)
21.9 % (4)
18.3 % (9)
14.6 % (8)
No
15.8 % (3)
23.9 % (9)
20.4 % (8)
26.2 % (7)*
22.9 % (25)
13.5 % (40)
Compressed work week
Yes
20.5 % (3)
22.2 % (3)
15.4 % (2)
24.2 % (7)*
23.0 % (12)
16.2 % (16)
No
14.1 % (1)
21.0 % (8)
19.5 % (9)
25.4 % (4)*
23.2 % (22)
12.0 % (32)
Note
Asterisked sample (*) include cases combined with other transportation services
Source
Reference [
1
], pp 19
28, Table 19.4
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