By far the most common form of lodging in rural United States and along many Interstates is the motel. Providing inexpensive rooms to automotive travellers, most motels are clean and reasonable with a limited array of amenities: telephone, TV, bed, bathroom. Motel 6 (http://www.motel6.com/) +1 800 466-8356 is a national chain with reasonable rates $30-$70, depending on the city. Super 8 Motels (http://www.super8.com/) +1 800 800-8000 provides reasonable accommodations throughout the country as well. Reservations are typically unnecessary, which is convenient since you don't have to arbitrarily interrupt a long road trip; you can simply drive until you're tired then find a room. However, some are used by adults looking to book a night for sex or illicit activities and many are located in undesirable areas.
Business or extended-stay hotels are increasingly available across the country. They can be found in smaller towns across the midwest or in coastal urban areas. Generally they are more expensive than motels, but not as expensive as full-scale hotels, with prices around $70 to $170. While the hotels may appear to be the size of a motel, they may offer amenities from larger hotels. Examples include Marriott's Courtyard by Marriott, Fairfield Inns, and Residence Inns; Hilton's Hampton Inn and Hilton Garden Inn; Holiday Inn's Holiday Inn Express; Starwood's Four Points by Sheraton, and Hyatt Place.
Some extended-stay hotels are directed at business travelers or families on long-term stays that are often relocating due to corporate decisions. These hotels often feature kitchens in most rooms, afternoon social events generally by a pool, and serve continental breakfast. Such "suite" hotels are roughly equivalent to the serviced apartments seen in other countries, though the term "serviced apartments" is not generally used in American English.
Hotels are available in most cities and usually offer more services and amenities than motels. Rooms usually run about $80-$300 per night, but very large, glamorous, and expensive hotels can be found in most major cities, offering luxury suites larger than some houses. Check-in and check-out times are almost always fall in the range of 11AM-noon and 2PM-4PM. Note that many U.S. cities now have "edge cities" in their suburbs which feature high-quality upscale hotels aimed at affluent business travelers. These hotels often feature all the amenities of their downtown/CBD cousins and more, but at less exorbitant prices.
In many rural areas, especially on the coasts and in New England, bed and breakfast B&B lodging can be found. Usually in converted houses or buildings with less than a dozen units, B&Bs feature a more home-like lodging experience, with complimentary breakfast served of varying quality and complexity. Bed and breakfasts range from about $50 to $200 per night, with some places being much steeper. They can be a nice break from the impersonality of chain hotels and motels. Unlike Europe, most American bed and breakfasts are unmarked; one must make a reservation beforehand and receive directions there.
The two best-known hotel guides covering the U.S. are the AAA formerly American Automobile Association; typically pronounced "Triple-A" TourBooks, available to members and affiliated auto clubs worldwide at local AAA offices; and the Mobil Travel Guide, available at bookstores. There are several websites booking hotels online; be aware that many of these sites add a small commission to the room rate, so it may be cheaper to book directly through the hotel. On the other hand, some hotels charge more for "drop-in" business than reserved rooms or rooms acquired through agents and brokers, so it's worth checking both.
There are also youth hostels across the U.S. Most are affiliated with the American Youth Hostel (http://www.hiayh.org/) organization a Hostelling International member. Quality of hostels varies widely, but at $8-$24 per night, the prices are unbeatable. Despite the name, AYH membership is open to people of any age. Non-AYH hostels are also available, particularly in larger cities. Be aware that hostels are clustered in more touristy locations, do not assume that all mid sized towns will have a hostel.
Camping can also be a very affordable lodging option, especially with good weather. The downside of camping is that most campgrounds are outside urban regions, so it's not much of an option for trips to big cities. There is a huge network of National Parks (http://www.nps.gov/) +1 800 365-2267, with most states and many counties having their own park systems, too. Most state and national campgrounds are of excellent quality, with beautiful natural environments. Expect to pay $7-$20 per car on entry. Kampgrounds of America (http://www.koakampgrounds.com/) KOA has a chain of commercial campground franchises across the country, of significantly less charm than their public-sector equivalents, but with hookups for recreational vehicles and amenities such as laundromats. Countless independently owned private campgrounds vary in character.
Some unusual lodging options are available in specific areas or by prior arrangement. For example, you might enjoy staying on a houseboat in Lake Tahoe or the Erie Canal. Or stay in a treehouse in Oregon. More conventional lodging can be found at college or university dormitories, a few of which rent out rooms to travelers during the summertime. Finally, in many tourist areas, as well as big cities, one can rent a furnished house by the day.