Sub-problem 5a: I-87 Interchange - Merges and Diverges on the Freeway

Southbound On-Ramp
Exhibit 2-56 shows the performance of the southbound on-ramp. The density is 26.9 pcplpm in the AM Existing condition and 27.5 pcplpm in the AM Without/With condition. There’s no difference in the volumes. The LOS is C in both cases. The adjacent ramp is the upstream southbound-to-eastbound off-ramp. You can click here to see the two datasets.

So far, we have studied single lane ramps with single lane upstream or downstream on- or off-ramps. The northbound off-ramp is a bit more complex. It has a two-lane ramp, so you have to provide a bit more input. It’s also useful to see if the two lanes are necessary.

with Sub-problem 5a