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Sub-problem 4c - Page 1 of 7

ID# C404C01

Sub-problem 4c: Peak Operational Analysis of Alternate Route 7

Step 1. Setup

The operation of the facility during the peak period illustrates a very important point. What happens on the freeway mainline when the demand during one time period exceeds the capacity of the freeway to handle the demand. We will again consider only the eastbound portion of Alternate Route 7. The demand for four consecutive 15-minute time periods during the afternoon peak period is shown in Exhibit 4-71.

Exhibit 4-71. 15-Minute Demand at Various Locations in the PM Peak Period

Freeway segment

 Demand
Time period 1 (veh/hr)		 Demand
Time period 2 (veh/hr)		 Demand
Time period 3 (veh/hr)		 Demand
Time period 4 (veh/hr)

Eastbound
Beginning of mainline section
On-ramp from I-87 northbound
Off-ramp to US route 9
On-ramp from US route 9
Off-ramp to I-787
On-ramp from frontage road
On-ramp from I-787 northbound
Ramp-to-ramp weaving volume
 

 

875

2,265

2,425
1,315
740
225

1,180

2,690

1,300
 

1,645

4,250

4,550
2,465
1,390

420
2,210

5,045

2,435
 

550

1,415

1,515
820
465

140
735

1,680

810
 

440

1,135

1,215
660
370

110
590

1,345

650

When you are ready to learn about the results of this analysis, proceed to the next page.

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