Car rental guide
The United States is close to the default case for a self-drive rental — its scale, interstate network, and dispersed attractions (national parks, small-town main streets, coastal drives like California's Highway 1) make a car close to essential outside a handful of transit-strong cities like New York or Chicago. Classic road trips such as Route 66 or a Southwest national-parks loop (Zion, Bryce, Grand Canyon) are built around having your own vehicle and schedule. Major airports in nearly every large city serve as rental pickup points, and one-way rentals across states are common enough to be a standard product.
Driving and renting a car
The US drives on the right, with a well-developed interstate highway system that's mostly free, though some states (like New York, New Jersey, and parts of the Northeast) have tolled sections, sometimes billed automatically via transponder rather than cash. Speed limits and specific traffic laws vary by state, and it's worth knowing this if a road trip crosses several state lines, since rules on things like cell phone use or right turns on red aren't uniform nationally.
Why compare local rental companies
US rental pricing structures often separate the base rate from add-ons like additional driver fees, young-driver surcharges (typically under 25), and airport concession recovery fees, so compare the full total rather than the advertised daily rate. One-way rentals across states or regions usually carry a drop fee that can be substantial for long distances, worth checking before assuming a one-way trip is cost-neutral.