Irvine PA12 Project: Part I: Task 3

Department of Civil and Environmental Engineering	Spring 1998
CEE 129 Transportation Systems Analysis and Design	Dr MG McNally

Irvine PA12 Project: Part I: Task 3

There are eighteen (18) Traffic Analysis Zones (TAZs) in the City of Irvine's Planning Area 12, an area defined by the SR-133 to the east, I-405 to the south, Woodbridge to the West, and the Santa Fe / Amtrak tracks to the north. There are eleven (12) external stations (four each to the west and the east, two to the north, and two to the south).

You have been provided with a TransCAD map file (129.map) containing the area sub-network extracted from the Irvine Transportation Analysis Model (ITAM95). The corresponding TransCAD network file (129.net) is also provided. Four origin-destination matrices have also been extracted from ITAM95:

2-Hour AM Peak Period (7-9 AM)
3-Hour PM Peak Period (4-7 PM)
1-Hour AM Peak Hour (7-8 AM)
1-Hour PM Peak Hour (5-6 PM)

This TransCAD matrix file (129-odm.mtx) contains all four matrices. Note that many of the zones are not yet developed and therefore have no trip origins or destinations. The matrices reflect only zones with non-zero O/D flows.

Task 3.1 Review Network

Review the 129 network for PA12. Compare your field survey results with the network to verify its accuracy. Produce layouts displaying major network characteristics. In addition to the conventional link attributes in the Tranplan-format link data records, several Link Group attributes are included:

Link Group 1 (LG1): 1st digit is Area Type; 2nd is Use Code
Link Group 2 (LG2): Number of Lanes
Link Group 3 (LG3): Not used

Task 3.2 Review O/D Demands

Review the 129 O/D demand matrices. Produce layouts of these matrices.

Table 3.1 Summary of Link Characteristics
Category Area Type Assignment Group

1 Central Business District Freeway

2 Commercial Major Arterial

3 Industrial Primary Arterial

4 Residential Secondary Arterial

5 Rural Commuter

6 Santiago Canyon Road Centroid Connector

7 Adjust Area 2-4 (+5mph) Freeway Connector

8 Adjust Area 2-4 (-5mph) Freeway Ramp

**Table 3.1 Summary of Link Characteristics**
Category	Area Type	Assignment Group
1	Central Business District	Freeway
2	Commercial	Major Arterial
3	Industrial	Primary Arterial
4	Residential	Secondary Arterial
5	Rural	Commuter
6	Santiago Canyon Road	Centroid Connector
7	Adjust Area 2-4 (+5mph)	Freeway Connector
8	Adjust Area 2-4 (-5mph)	Freeway Ramp

Task 3.3 Base Traffic Assignments

Using TransCAD, assign both AM and PM Peak Hour demand to the base network. You may need to try several ranges of parameters to insure that the model converges.

Display the results. This can include maps of link volumes, speeds, V/C ratios, etc. It should also include Intersection diagrams of key intersections. Everyone should include the intersection of Alton and Jeffrey.

Task 3.4 Preliminary Report

Prepare a preliminary report summarizing results. The purpose of this report is to insure that the networks and demands have been analyzed and to provide input to the traffic input study that follows. Follow conventional report guidelines. Tentative due date is May 15 at 10 AM.

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Last modified: Thu May 21 14:04:40 1998