Road Sign Math

To celebrate our 100th sign on Road Sign Math, today we are releasing the revised and updated 2nd edition rules. These rules should simplify the game, and answer some questions and comments that were provided for the original rules.
There are several improvements to the 2nd edition rules. Here are some highlights.

All the rules have [...]

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On August 14th we announced the 50th mathematically significant roadsign on Road Sign Math. Exactly 100 days after that (how convenient!), November 22nd, we are announcing another milestone. We have now reached our 100th mathematically significant roadsign. Road Sign Math has now been around for 274 days and has grown beyond our wildest dreams [...]

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Gene Kruckemyer, newcomer to Road Sign Math, brings us the first sign from the Sunshine state, Florida. Actually, he brings us another first in mathematically significant signs. Two, mathematically significant signs right next to each other, yet fully independent. A true “twofer”! This is a mathematical onslaught that could cause accidents while people are stupified [...]

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Darren Hodges brings another mathematically significant roadsign from Australia. Messr. Hodges runs a signspotters website. Continuing our education of Aussie road signs the “3P” indicates that you can park for three hours. Little known item about this sign as well, it’s actually part of the Australian Grand Prix F1 Circuit.

The math couldn’t be simpler [...]

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We return to the international version of mathematically significant roadsigns with this second sign from Israel submitted by Ephraim Grossman.

The math here is simple, if only obfuscated by the annoying poster plastered onto the sign.
2 + 3 = 5
This sign is at the southbound exit of the loop between the neighborhoods of Ramot Alon [...]

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Dan Bock brings a second sign from Charlotte, North Carolina. This sign is from the Uptown area of Charlotte. You can see Charlotte’s Hearst Tower in the background of this photo.

Big bonus points for Messr. Bock on this sign find for using the numbers in exactly the order they appear on the sign [...]

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Road Sign Math first-timer Dan Bock finds the first mathematically significant roadsign from North Carolina. Messr. Bock spent weeks hunting for a sign in the Raleigh/Durham area and then decided to head to Charlotte to look for signs. His persistence paid off!

At first glance these signs seem to be independent, and would thus have to [...]

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Randy Weiss brings this mathematically significant roadsign from Arlington, Massachusetts. You can see the Arlington Bell Tower in the background on the right.

Messr. Weiss was not excited by this math, continuing something that he doesn’t like to see in the solutions, but is perfectly acceptable math.
{60 \over 60} + 2 = 3
This sign [...]

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Continuing with Darren Hodges on our international trip we head to Australia. Messr. Hodges runs a signspotters website. The circled “S” wasn’t obvious to me and luckily Hodges pointed out that it means no standing, or stopping.

I appreciate Hodges solution to this sign, vearing away from the more obvious but ultimately more boring solution that [...]

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Road Sign Math goes international! This time we visit Taiwan for the very first time, thanks to Darren Hodges. Messr. Hodges runs a signspotters website. He brings us this sign from Tainan. I’d be happy to comment on the contents and directions of the sign, but I have no idea what it says.

This math is [...]

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