Sub-problem 5a - Page 2 of 3 |
ID# C405A02 |
Sub-problem 5a: Network Simulation
Step 2. Results
The most interesting
result from the simulation model is predictions of travel times through the
network. Exhibit 4-79 presents a selected set of those values. You can see
that it takes 467 seconds (seven minutes and 47 seconds) to go from a point
300 feet south of the 23rd Street off- ramp to a point 2,600 feet
north of the merge between I-87 and the right-hand ramp from NY-7 to I-87.
These values are valuable in indicating where travel times are within
acceptable ranges and where they are not. Geometric improvements may help
some O-D pairs and not others or alleviate congestion in one place and
create it in another. These travel times help to keep track of those impacts
and relationships.
Another output that’s
particularly valuable is speeds through the weaving sections. Weaving
sections tend to be bottleneck locations. Exhibit 4-80 shows
speeds for weaving and non-weaving vehicles at a number of locations in the subarea network, based on the simulation model outputs. Data for locations
1-7 are shown in
Exhibit
4-80. The slowest speeds are on Alternate Route 7 at
the I-787 interchange on the collector-distributor road between the loop
ramp from I-787 south and the loop ramp to I-787 north. The rest of the
speeds are in the 50-60 mph range, indicating acceptable operation.
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