Comparison of Self-Reported to Network-Calculated Trip Distances for the California Add-On to the 2009 National Household Travel Survey

摘要

This paper reports on the results of a comparison of self-reported trip distances and times withnetwork-calculated distances and times for the California add-on sample of the NationalHousehold Travel Survey from 2009. Geocoded origins and destinations were obtained through aconfidentiality agreement with the California Department of Transportation, and trip networkdistances and times were calculated using the MapQuest algorithm. All trips that were made onfoot, by bicycle, or by car and that had origins and destinations that were geocoded to the exactaddress or intersection are included in this analysis (more than 100,000 trips). Trip times werecompared only for car trips, while distances were compared for all three modes. The resultsindicate that self-reported distances and times are, on average, longer than calculated distancesand times. Self-reported car and bicycle trip distances appear to be more reliable than selfreportedwalk trip distances and car trip times. Regression analysis identifies variables that affecthow much the self-reported and calculated distances diverge.TRB