Summer travel plans: Shorter trips in the U.S. By Art Pfenning / April 22, 2004 Share 1 -- ccording to a new study, the 2004 Roper Reports Summer Travel Outlook, nearly three in five (58%) U.S. adults are planning to take a vacation over the next six months. However, most of them (80%) said they will travel within the continental U.S. U.S. travelers are placing an emphasis on cost (62%) as the determining factor in planning their next getaway. In fact, more than half (56%) said they intend to drive to their vacation destination. In addition, respondents said their next vacation will be relatively short -- almost seven out of 10 (68%) said they will be away a week or less.Although summer is only a couple of months away, two-thirds of Americans (67%) have not yet made arrangements for their vacation and almost half of those polled (46%) said they will use the Internet to plan their trip.Despite the fact that cost was listed as the main factor in determining a traveler's next vacation destination, more than half of respondents (56%) said they will eat at "fancy" restaurants during their vacation and nearly half (47%) said they will go shopping more while on vacation than when at home.Art Pfenning is the research director for Northstar Travel Media, Travel Weekly's parent company. Send e-mail to firstname.lastname@example.org.