This report identifies the types and sources of person travel data likely to be used for state-wide transportation planning and presents procedures for developing sampling plans and survey designs for conducting travel surveys to collect the required travel information. Sampling concepts, formulas, and survey administration guidelines are documented for conducting state-wide and regional household travel surveys, intercity modal passenger surveys, and roadside surveys. Both cross-sectional and seasonal survey designs are evaluated. Procedures are presented for estimating required sample sizes for alternative types of survey estimates of interest in state-wide transportation planning. The application of these procedures is illustrated using "real world" sampling problems. The influence of alternative levels of precision on sample size requirements is presented in the report.
Abstract