Car rental and road trip guide to United States

Driving in the United States

The US drives on the right, and the sheer scale of the interstate system means that distances which look short on a map can still mean a full day behind the wheel, especially west of the Mississippi.

Speed limits, road signage conventions, and even something as basic as whether a right turn on red is allowed all vary by state, so a road trip crossing several state lines is worth a quick mental note of what changes where.

Beyond the interstates connecting major cities, a rental car opens up the winding two-lane blacktop of Highway 1 along California's cliffs, the sweeping red-rock switchbacks of Utah's national parks, and the flat, palm-lined causeways linking the Florida Keys, three versions of the country that feel worlds apart.

What catches drivers off guard

• A stopped school bus with flashing red lights requires traffic in both directions to stop on most undivided roads, a rule enforced with genuinely steep fines that catches out visiting drivers who assume it only applies to the lane behind the bus.
• Right turns on a red light after a full stop are legal in most states unless a sign specifically prohibits it, which surprises visitors used to countries where red always means a complete stop until green.
• Rental cars picked up at airport locations often carry a noticeably higher price than the same car from a nearby off-airport branch, and a short rideshare to a downtown counter can offset its own cost within a day or two.
• Gas stations along interstate exits vary dramatically in price within just a few miles of each other, and a quick check on a fuel-price app before pulling off often saves more than the few minutes it costs.
• Distances between rest stops on rural interstates can stretch well past an hour in less populated states, so treating any fuel gauge below a quarter tank as a reason to stop rather than push on is the safer habit.

California's Pacific Coast Highway

The stretch of Highway 1 through Big Sur has no cell signal for long sections and narrow, guardrail-free curves cut directly into the cliffside, so a driver's full attention belongs on the road rather than the ocean view until a proper turnout appears.

Bixby Creek Bridge draws heavy crowds for photos at a small pullout just before it, and arriving in the first hour after sunrise usually means finding a spot without waiting for other cars to clear the frame.

South of Carmel, the road climbs and drops through redwood groves where fog can roll in within minutes even on a clear morning, cutting visibility sharply and calling for headlights on well before dusk.

Utah and Arizona's canyon country

The drive between Zion and Bryce Canyon national parks climbs through a mile-long tunnel blasted through solid sandstone in the 1920s, and oversized vehicles need a ranger-controlled escort to pass through it, a detail worth checking before booking a large rental.

The switchback descent into Bryce Canyon's amphitheater offers pullouts every few hundred meters, and stopping at Inspiration Point rather than only the main visitor center viewpoint avoids most of the midday crowds.

Monument Valley's scenic loop drive is a rough dirt road best suited to a higher-clearance vehicle, and standard sedans can complete it slowly but should expect a genuinely bumpy, dusty hour rather than a smooth scenic detour.

Miami to the Florida Keys

The Overseas Highway links the Keys with a series of causeways and bridges over open water, and the Seven Mile Bridge in particular offers an uninterrupted straight run with the Atlantic on one side and the Gulf on the other.

Key Largo's dive shops offer easy access to John Pennekamp Coral Reef State Park, and parking at the visitor center rather than a private lot nearby usually costs less for a half-day snorkeling stop.

Key West's Duval Street area has limited and pricey parking, so leaving the car at a hotel or public lot on the edge of town and walking or cycling in is generally the more relaxed way to spend an afternoon there.

Places most rental drivers miss

Pescadero, a tiny farm town roughly halfway down the coast between San Francisco and Big Sur, has a bakery famous for its artichoke bread that turns an otherwise straightforward coastal drive into a genuine detour worth taking.

Valley of the Gods, a lesser-known cousin of Monument Valley about an hour north in Utah, offers similar red-rock formations along a graded dirt loop with almost no other vehicles on it, even during the busiest tourist months.

Bahia Honda State Park, roughly midway down the Overseas Highway, has one of the few genuine sandy beaches in the Keys and a short walkable section of the old railroad bridge with sweeping views in both directions.

Driving in and around Los Angeles

Los Angeles freeways go by number rather than compass direction in casual conversation, and locals refer to them with a definite article, so hearing directions phrased as "take the 405" rather than "take Interstate 405" is entirely normal.

Traffic on the 405 and 101 can turn a normally 20-minute crossing of the Sepulveda Pass into over an hour during weekday rush periods, so scheduling airport drop-offs and pickups with real buffer time is worth the peace of mind.

Street parking rules in LA are enforced with genuinely strict street-cleaning tow schedules posted on small signs easy to miss, so double-checking the posted hours before leaving a car overnight on an unfamiliar residential street avoids a costly tow.

Practical checklist before you drive

• A foreign driving licence is generally accepted for the length of a typical visit, and while an International Driving Permit is not always legally required, carrying one avoids any confusion at a rental counter or a roadside stop.
• The US drives on the right, and while many states permit right turns on red, seatbelt laws, phone-use restrictions, and speed limits are all enforced at the state level and can shift noticeably at a border you might not even notice crossing.
• Rental cars in the US are almost universally automatic transmission, so anyone specifically wanting a manual should confirm availability well ahead of time rather than assume it will be an option.
• Most rental agreements charge a hefty fee for crossing into Mexico or Canada without prior arrangement, so anyone planning a border crossing should raise it explicitly at booking rather than assume standard coverage extends across the line.
• Toll roads around major cities increasingly use license-plate cameras rather than manned booths, and a rental agency typically bills any tolls incurred directly to the card on file along with an administrative fee weeks after the trip ends.

When to go and what the roads are like

Late spring and early autumn generally offer the most reliable driving conditions across California and the Southwest, with mild temperatures for canyon hikes and coastal drives alike before the heaviest summer crowds arrive.

Summer heat in the desert Southwest routinely tops 40 degrees Celsius, and hiking into canyons during the hottest midday hours is genuinely dangerous, so early starts and carrying more water than seems necessary are standard practice.

Hurricane season in Florida runs from June through November, and while the Keys are rarely hit directly, checking a storm forecast before a Keys trip during peak season is a sensible habit rather than an overreaction.

A one-week driving route

Before you hand the keys back

Ask the agency directly whether any tolls incurred along the trip, from Bay Area bridges to Florida turnpike sections, have already been settled or will appear as a later charge, since policies vary widely between companies.

Check the vehicle for sand tracked in from a Keys beach stop or fine desert dust from the canyon country before returning it, since a thorough interior clean avoids any surprise cleaning charge on the final bill.