Traffic - For a Project Located on the Caltrans Highway System

The following controls, located on the Input -> Project Information Page, are used to view the one-way traffic counts and other traffic data.

eLCAP uses one-way traffic data for the following:

•The effects of the Use Stage, occurring between successive construction events, is modeled by a GHG equation (based on IRI roughness increasing with time) dependent on car and truck volumes for each lane in the project

eLCAP obtains the one-way traffic data by finding the traffic segment in the Caltrans traffic database that contains the PM for the center of the project.

One-way traffic data item:

•PM Boundaries for the traffic segment containing the center of the project

•AADT - average annual daily traffic (cars and trucks)

•AADTT - average annual daily truck traffic

•Percent Trucks - the percentage of trucks in AADT

•WIM - Group and Spectrum (an axle load distribution curve)

•Percent Growth - the percent traffic growth from the latest traffic measurement and the date for the first event. eLCAP uses today's date until events have been defined.

•First Year Design Lane: Trucks, Axles and ESALs. eLCAP uses today's date until events have been defined.

•The number of axles per truck

•The latest year of traffic data

The question mark in the blue circle in the upper-right of the control group allows you to get help on the controls (this topic).

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