10.0 Corridor/Network Management Strategies

These strategies intend to optimize traffic flow through the work zone corridor and adjacent roadways using various traffic operations techniques and technologies.

10.1 Truck Restriction

This strategy imposes restrictions on truck travel through the work zone during specific periods. Although trucks account for 9.6% of all traffic through the "Boat Section", truck traffic north of the Boat Section in Woodland at the Interstate 5 and State Route 113 separation is as high as 24.1%. Imposing restrictions on trucks by diversion or detour will drastically increase roadway capacity for passenger vehicles through the work zone. The Office of Traffic Operations will coordinate the implementation of a truck detour.

10.2 Signal Timing/Coordination Improvements

Coordination efforts between the City and Caltrans will optimize traffic flow within the network. Retiming traffic signals on City streets will be done as needed to increase throughput of the roadways and optimize intersection capacity in and around the work zone.

10.3 TMP Effectiveness Monitoring

During construction, the Office of Freeway Operations, Sacramento, will collect and analyze non-recurring congestion data using tachometer runs during the morning and evening peak periods on a Tuesday, Wednesday, or Thursday on all freeway corridors approaching the project area. Each "tachrun" involves a two-car team, using the "floating car" method. The cars are separated by 15 minutes as they follow one another along the corridor. The process is repeated several times during the course of the peak period.

Non-recurring congestion determined from the tachrun data will be analyzed according to its magnitude, time, and space distribution. The total vehicle-hours of congestion are converted into congestion measuring parameters of congested lane-miles, congestion duration, average speeds, user delay, and user delay cost. These congestion characteristics can then be compared with the pre-construction conditions.

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