A line looping across the United States makes a tempting promise: perhaps somebody has already solved the road trip for us. Randal Olson’s widely shared map certainly gave travellers a lot to dream about.

The useful part of his 2015 project is not a claim that one route is perfect for everyone. It is the way a large planning problem becomes more manageable once the stops and rules are defined.

Historical map showing Randal Olson’s selected United States landmark route
Historical map showing Randal Olson’s selected United States landmark route. Historical route visualisation, not current navigation. Gallery attribution: Randal S. Olson.

The map began with choices

Olson’s original explanation describes a landmark-based route through the 48 contiguous states. Alaska and Hawaii were outside that road network; the itinerary was never a drive through all 50 states.

The stops were selected before the route was arranged. A genetic algorithm then searched for a good ordering by repeatedly trying and improving candidate routes. This was a practical optimisation approach, not a mathematical proof that no better route could exist under every possible definition.

The distinction is worth keeping. The computer worked on the question it was given; it did not decide which places would mean the most to a particular traveller.

“Best” depends on what you measure

Consider two possible routes between the same overnight stops. One reduces driving time. Another follows a coast, passes a museum you love or makes a lunch stop easier. The shorter route wins one comparison and may lose another.

You can also optimise for fewer hotel changes, a daily driving limit, accessible facilities or time with friends. None of those preferences is a flaw in the plan. They are part of the plan’s purpose.

A useful travel tool helps you express those priorities rather than hiding them beneath an impressive-looking line.

Driving time is not holiday time

An estimate of hours behind the wheel does not include the time needed to enjoy each stop. Meals, fuel, queues, rest, weather and the occasional wrong turn all belong in a real journey.

Try a small example. If you have four nights available, first decide where you want to spend the longest stretch outside the car. Work outward from there, allowing sensible arrival times. If the map demands another long drive every morning, remove a stop and see what becomes possible.

You may gain an evening walk, a museum visit or simply the pleasure of unpacking for two nights.

Use the old map as inspiration

The original route records the data and assumptions of its time. It does not supply current access arrangements for parks, roads or individual landmarks. Recheck the places you actually choose through their official visitor information.

For a road with a strong historical identity, explore the Route 66 story. For the everyday details that make driving days easier, use our road trip essentials.

The map’s lasting gift is a planning question: given the places that matter to you, how can you connect them well? That is a more interesting challenge than following somebody else’s idea of the ultimate trip.

The stops are the input, not the result of choosing every best place

Randal Olson’s route exercise began with a selected list of landmarks and sought a useful order for visiting them across the contiguous United States. That is different from proving that these are the best places for every traveller or including Alaska and Hawaii in one road loop.

The original stop list runs from the Grand Canyon, Bryce Canyon, Craters of the Moon, Yellowstone and Pikes Peak through Carlsbad Caverns, the Alamo, the Platt Historic District, Toltec Mounds, Graceland, Vicksburg, New Orleans, USS Alabama, Cape Canaveral, Okefenokee, Fort Sumter, Lost World Caverns and the Wright Brothers memorial. These names preserve the exercise’s specific input rather than replacing it with a generic coast-to-coast suggestion.

The eastern and return sections include Mount Vernon, Washington, Annapolis, New Castle, Cape May, the Liberty Bell, Statue of Liberty, Mark Twain House, the Breakers, USS Constitution, Acadia, Mount Washington Hotel, Shelburne Farms, Detroit’s Fox Theatre, Spring Grove Cemetery, Mammoth Cave, West Baden Springs, Lincoln’s Home, Gateway Arch, the C. W. Parker Carousel Museum, Terrace Hill, Taliesin, Fort Snelling, Ashfall Fossil Beds, Mount Rushmore, Fort Union, Glacier, Hanford, the Columbia River Highway, San Francisco’s cable cars, the San Andreas Fault and Hoover Dam.

The reported driving hours exclude the time needed to experience those places. A loop can also be started at different points without becoming a complete travel plan: opening arrangements, rest days and personal interests still matter. The old instruction to skip Kansas and Nebraska contradicts named stops in those states and is not retained.