With summer officially here on Tuesday, now is the time to plan a road trip. If you're heading south of the border, here are a few ideas:

- From Let's Go Publications comes Roadtripping USA: The Complete Coast-to-Coast Guide to America (St. Martin's Press). The publishers sent nine twentysomethings out to plot the best routes and find good but inexpensive restaurants, attractions and lodgings along the way.

The book has itineraries for eight trips including an East Coast drive, from Acadia National Park in Maine to Key West, and a drive across the Great Lakes states to Vancouver.

The longest road trip is a 12,000-km, three-country trek from Mexico City through Arizona, Nevada, Idaho and Montana, to the Canadian Northwest and Alaska.

- Reader's Digest has just published a revised edition of The Most Scenic Drives in America: 120 Spectacular Road Trips, listing byways you can see in a day, a weekend or a week.

Trips range from a drive in Pennsylvania Dutch Country, to a trek through Idaho, taking in rivers, mountains and prairies. Other featured areas include the Maine coast, Missouri Ozarks, Wisconsin North Woods, Texas Hill Country and a trip along Route 50 through the Nevada desert.