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Sub-problem 2d - Page 7 of 7 |
ID# C402D07 |
Sub-problem 2d: How
Can We Improve the Level of Service at the Ramp Junction at the Northbound On-Ramp to
I-87?
Exhibit 4-37 shows the effect of increasing the
acceleration lane from 500 (existing condition) to either
1,000
feet or 1,500 feet. Again, as with the addition of a lane to the ramp, the effect is not
significant. In fact, as we saw before, the demand still exceeds the
capacity of the merge influence area and so, here again, we cannot depend on the results
from the HCM model for this analysis.
|
Exhibit 4-37. Effect of Lengthening
the Existing Acceleration Lane |
|
AM Peak Hour (7 am - 8 am) |
|
Dataset |
Acceleration lane (feet) |
Density |
LOS |
Speed |
|
Dataset 23 |
500 |
13.7 |
B |
51 |
|
Dataset 24 |
1,000 |
10.7 |
B |
52 |
|
Dataset 25 |
1,500 |
7.7 |
A |
52 |
|
PM Peak Hour
(4 pm - 5 pm) |
|
Dataset |
Acceleration lane (feet) |
Density |
LOS |
Speed |
|
Dataset 26 |
500 |
42.4 |
F |
42 |
|
Dataset 27 |
1,000 |
39.9 |
F |
41 |
|
Dataset 28 |
1,500 |
37.3 |
F |
41 |
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