[CTPP] Census Journey to Work Question

I need to get more information on the Journey to Work questions. Can you help me understand why only the one-way home-to-work trip is asked for? Why not the return trip? Is it correct to double the Census travel times to generalize "the average worker spends 51 minutes a day commuting?" I would appreciate your input. The questions arise because we posted the Census data on our web site. We aggregated the data to our geographies and to a more manageable number of categories. As you can imagine; radio stations, outdoor advertising companies, and their ad agency and advertiser clients are very interested in commuting info. If you are interested, you can see the application at <http://www.arbitron.com/radio_stations/transportation.htm> http://www.arbitron.com/radio_stations/transportation.htm. Dan Estersohn Senior Demographer Arbitron, Inc