Sub-problem 4a: Division of Alternate Route 7 for Analysis

It is important that the time and space domain we establish includes time intervals during which any congestion or overcapacity may occur. For example, if the demand exceeds the capacity of a section for one 15-minute period, we need to continue the analysis for another time period in order for all of the demand to be served. In addition, we need to make sure that the overall length of the facility is such that vehicles are normally able to travel from one end to the other within 15 minutes, again so that all demand can be served during the study period. Finally, the facility should be long enough to contain any queues that form and to ensure that there are no traffic interactions with any upstream facility.

Now let's get started on this sub-problem and see how we can use these guidelines to analyze Alternate Route 7. Exhibit 4-63 shows line drawings of both the eastbound and westbound alignments of Alternate Route 7, from the I-87 interchange on the west to the I-787 interchange on the east. Study Exhibit 4-63 to better familiarize yourself with the components of this facility.
 

Discussion:
Consider the information presented in the line drawings above showing some of the geometric characteristics of Alternate Route 7. After reviewing the information included in the drawings, list the segments that you think should be analyzed. When you are ready, proceed to the next page.