The corridor you pick shapes every other decision: days needed, the season that works and whether the road itself is the destination. Here is how the classic crossings compare.
Road notes
- Budget driving days before destinations: a 2,400-mile route like historic Route 66 needs far more time than an interstate crossing of the same country.
- Route 66 opened in 1926 and was retired as a highway in 1985; today you follow surviving alignments past more than 250 National Register of Historic Places sites.
- America’s Byways includes 184 designated roads across 48 states, and All-American Roads are the top tier for roads considered destinations in themselves.
- Pick a latitude for the season: southern and low-elevation corridors are easier in winter, while northern routes shine in summer.
- Check state DOT road condition maps and National Park Service pages in the week you travel, since closures and construction change fast.
Your first drive across the country is mostly a set of decisions made before the car is loaded. The biggest is the corridor: the rough line your route follows across the map. Choose it with your calendar and the season in mind, and every later decision gets easier.
Start With Your Days, Not Your Destination
Most first-timers pick the famous road first, then try to squeeze it into the days they have. Flip it around. Count the driving days you can honestly take, subtract travel days at each end, and hold back one or two buffer days for weather, closures or a flat tire. What is left is your real budget, and it should drive the corridor choice more than any wish list.
Distance alone does not tell the story. Route 66 runs 2,400 miles from Chicago to Los Angeles, but two-lane routes rarely move at interstate speed, and stopping is the point. A straightforward interstate crossing of the same country takes fewer days, which is why many drivers mix the two. The red flag in any plan is a schedule where every day has to go right.
Nostalgia Drives: Two-Lane Legends Like Route 66
Route 66 is the classic. It opened in 1926 as part of the nation’s first federal highway system and ran from the Lake Michigan shore through Illinois farmland and the Missouri Ozarks, across Kansas and Oklahoma and the ranch country of Texas, then over the mesa country of New Mexico and Arizona and the Mojave Desert to the Pacific at Los Angeles. Interstates built after 1956 replaced its sections over the following decades, and by 1985 it was officially retired as a highway.
That history explains both the appeal and the work. You will not follow one numbered road; you follow surviving alignments, marked today by signs and exhibits. More than 250 buildings, bridges and other sites along the route are listed on the National Register of Historic Places, and the National Park Service publishes a travel itinerary highlighting more than 100 of them. Historic Route 66 in Arizona is a designated National Scenic Byway, and California’s Needles to Barstow stretch joined the list in 2021.
Pick this corridor only if the road itself is the trip and you have the days to let it be. For more routes in that spirit, see our guide to planning a scenic byway trip.
Road-tested tip
Treat the America’s Byways collection as a menu rather than a route. It holds 184 designated roads across 48 states, including 37 All-American Roads, roads considered destinations in themselves, and you can chain a few onto an interstate crossing instead of driving a full two-lane journey.
Fast but Scenic: Corridors That Balance Interstates and Views
If your days are limited, the honest answer is a hybrid: run the interstate for the miles with no story, then exit for the stretches that do. Great River Road segments along the Mississippi, including a stretch in Arkansas designated in 2021, thread river towns that pair well with an east-west crossing. A two-lane crossing of the middle of the country sits at the other extreme: fewer services, and a pace you set yourself.
The trade-offs to weigh:
- Hybrids cost planning time, because every byway exit is a detour you have to route and fuel.
- Pure two-lane corridors cost calendar time, and services can sit far apart.
- All-interstate routes cost scenery, and many eastern toll roads add fees to budget.
| Corridor | Days it tends to need | Best fit |
|---|---|---|
| Route 66 and other two-lane legends | The most, plus slack days | Travelers for whom the road is the destination |
| Great River Road segments | Flexible, north to south | Drivers pairing river towns with a main crossing |
| Interstate-plus-byway hybrid | The fewest | A first cross-country trip on a work schedule |
North, Middle or South: Picking a Latitude for the Season
A corridor is also a climate choice. Southern and low-elevation routes are the easier call in winter, when mountain passes in the middle of the country can close for snow and ice. Northern routes shine in summer with long daylight, but they turn on you first in the shoulder seasons. Desert stretches on western routes feel milder in spring and fall and punishing at the peak of summer heat.
If your line crosses high country, read up on chain requirements and tire rules before you commit, since they vary by state; our winter mountain driving guide covers what to check. Build the route so a closed pass has a sensible alternate, because mountain weather can differ sharply from the forecast in the valley where you slept.
Vehicle Reality Checks: Fuel Stops, Passes and Cell Coverage
Whatever corridor you choose, match the car plan to the road. On two-lane western stretches, services can be separated by long gaps, so fill the tank at half and carry water. Do the road trip fuel math for your specific route, because slow two-lane miles burn more fuel than the raw distance suggests.
EV drivers should go further and plan charging around the corridor itself. Two-lane routes have fewer fast chargers than interstates, so map every stop with a fallback and favor overnight towns where you can charge while you sleep. Cell coverage is the other quiet variable: long rural stretches of several corridors have none, which makes offline maps worth the ten minutes they take to set up.
Confirming Road Conditions Before You Commit
Corridor choice is a plan, not a promise. Construction, closures and weather reroute two-lane roads constantly, and a detour that adds an hour at home can add three in the middle of nowhere. In the week before you leave, check the road condition maps published by each state Department of Transportation on your line, along with National Park Service pages for any park drives you have folded in. Then check again the morning of each long driving day.
A first big drive rewards the driver who plans the boring parts carefully. If your corridor means several long days behind the wheel, our guide to long driving days without the drowsiness sets sensible limits for how far to push each one.
Questions from the road
Q: Is Route 66 drivable end to end?
A: Not as a single marked highway. It was officially retired in 1985 and interstates replaced much of it, but signs, exhibits and surviving alignments let you follow large parts of the original road from Chicago toward Los Angeles.
Q: How many days should a first cross-country drive take?
A: Plan from your calendar, not the map. An interstate-focused crossing needs fewer days than a two-lane route of the same distance, and every plan should hold buffer days for weather, closures or delays.
Q: What is the difference between a National Scenic Byway and an All-American Road?
A: A National Scenic Byway has at least one of six intrinsic qualities, such as scenic or historic, that are significant to its region. An All-American Road has nationally significant qualities and one-of-a-kind features, making it a destination in itself.
Q: Do I need a special vehicle for a cross-country route?
A: No, but match the vehicle plan to the corridor. Check fuel range against gaps between services, map charging with fallbacks if you drive an EV, and make sure the car is ready for mountain passes if your route crosses them.
Road rules, fees, closures and border requirements change. Check with the state transportation department, park, rental company or border agency before you travel. This guide is general information.
