Road Sign Math

Randy Weiss found this truly fascinating sign at the entrance of Dinosaur National Monument in Utah. Up to this point the math in our signs has been composed of mainly units in miles or road numbers, with an occasional exit number added for fun. This sign will have none of that. Instead, this sign [...]

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It seems very common to find math in road signs that are around colleges and universities. Mayville State University didn’t want to be left out and put the hint directly on the off-ramp as you head towards the city of Mayville. Mayville and Portland are interesting towns, if not a bit presumptuous. A visit [...]

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I recently received the following email from Noel Norwood regarding some of the constant signs here on Road Sign Math.

I just came across your site today and find it very exciting. I have often thought about mathematical patterns on road signs, but I never have made a record of them. I will, now, and [...]

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Continuing a run of four 4, 2 mathematically significant roadsigns is this great submission from Spain by Rodrigo Méndez Carbajo. Road Sign Math appears to be a universal language. While traveling on M-40, which rings Madrid, he found this winner on a gantry over the road. He whipped out his camera phone and snapped this [...]

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After driving for hours in North Dakota with little success in finding mathematically significant roadsigns I stumbled upon these little signs along the side of the road. They are interesting because they are placed by the highway department, but they appear to be house numbers. While cruising down US-2, after figuring these signs out, [...]

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North Dakota is the home of the founder of Road Sign Math. It is with great pleasure, and difficulty, that North Dakota makes it’s debut with a mathematically significant roadsign. After driving for nearly one thousand miles through North Dakota and not seeing a single sign that had a mathematical relationship it was a delight [...]

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Just south of Flaming Gorge National Recreation Area (really, that’s what it’s called!), in the Ashley National Forest, comes a small and humble tribute to mathematically significant roadsigns. It’s unclear what the orange trail marker on the sign is designating. Randy Weiss brings us this Utah sign.

There is only so much you can say about [...]

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A few days ago, Road Sign Math received a sign submission from a new player in Georgia. However, the sign submitted violated the fraction rule of the game, and the submitter was notified that their hopeful win was actually disqualified, and encouraged to continue to search for winning signs. A few hours later we [...]

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Randy Weiss found this mathematically significant roadsign in Utah. While descending the mountains via a number of switchbacks he started seeing a pattern. Each switchback had a different speed limit depending on the radius of the turn and the pitch of the highway at that point, and they announce how many more switchbacks to come [...]

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The section of I-94 from Minneapolis, MN to Fargo, ND is perhaps one of the most thoroughly scoured segments of highway in the search for mathematically significant signs, but it continues to produce. Just 67 miles down I-94 from Genesis, this great winner was found.

This winner hides it’s relationship pretty well. The math is [...]

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