Existing Scenario:

This is the analysis of existing traffic on the current roadway network. Field observations are made, and traffic counts collected if necessary. Lane configuration and geometries reflect existing field conditions. Existing traffic signal timings can be obtained from TxDOT or the City and used in the analysis.

Future Scenarios:

This is the analysis of the existing traffic, as well as background growth and all new trips generated by the proposed development. Typically, future analysis years involve the opening year of the development and five years out from the opening year (future horizon study year). For larger developments, interim study years can also be analyzed. These study years often correspond to the estimated completion of phases of the development.

Lane configuration and geometries can be altered to accommodate the increase in traffic. Signal timings can be optimized to accommodate the extra traffic generated. These changes are documented as mitigations.

Example

problems of future scenario analysis and possible mitigations can be found in

Appendix Q, Section 3 – TIA Example Problems

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