Jamie Thingelstad puts another mathematically significant roadsign up for the great state of Minnesota.

The math reveals itself without much effort.

This sign is found in the first couple of miles after you’ve entereed Minnesota heading north on I-35. See sign on map!

Jamie Thingelstad found this sign in the birthplace of Road Sign Math, Minnesota. Just outside of the great bicycling and recreation destination of Lanesboro this wonderful sign was placed for the mathematically curious.

The math on this sign could knock you over with it’s simplicity.

This sign is found on outside of Lanesboro, Minnesota. See sign on map!

Here is the third submission from Jim Bernard Jr., an early RSM enthusiast. The math isn’t going to win any awards, but it qualifies as a winning sign and as of the submission date there doesn’t seem to be anything controversial about it (unlike a recent sign submitted by his father).

The sign offers directions to Excelsior Blvd which is also known as Highway 3 though not many people seem to call it that. Excelsior Blvd at one time was home to over 40 gas stations which caused local historian Jeanne Anderson to call it, “The Gas Station Capital of the Midwest.” Her claim that there were forty gas stations appears to be well documented, the assertion that it was at that time a Gas Station Capital is harder to verify. Given that, we at RSM accept it willingly and kindly direct you to a terrific historical photo of a Sid’s Gas Station.

Mr. Bernard draws a nice solution to this sign that is not immediately obvious.

This sign puts Mr. Bernard safely ahead of his arch-rival Aaron Oliver in the scoring. This sign is found on Highway 169 northbound in Minneapolis, Minnesota. See sign on map!

Ed.: It is worth noting that the creator of Road Sign Math has driven by this sign dozens, perhaps several dozens, of times and never taken note of the mathematics implied. Kudos to Mr. Bernard!

Dave Oosterhuis discovers the wonder of parking signs and the mathematical relationships found in them.

Mr. Oosterhuis explored a number of solutions for this sign and finally settled on this one.

This sign is found on Lyndale Avenue, between 38th and 39th street south in Minneapolis, Minnesota. The GPS coordinates are approximately N44.93323 W93.28800. See sign on map!

Ed.: We’ve seen a rash of these signs and may have to stop posting these simple parking or other hour slot signs. They are usually a gimme since the time slices they cover are intended to be equal.

Dave Oosterhuis brings another mathematically significant roadsign from Minnesota. This sign is right in the backyard of the founder of Road Sign Math, who is ashamed to realize that he never recognized this one.

Very nice math in this sign. The 18 goes into the 36 wonderfully.

This sign is on I-35W northbound just after you cross the Mississippi river. The GPS coordinates are approximately N44 58 47.6 W93 14 40.3. See sign on map!

This sign is submitted by Road Sign Math first-timer, and brother-in-law of the founder of the hunt for mathematically significant roadsigns, Dennis Daily. This sign is a hidden tribute to Rolling Rock beer, and it’s references to “33″ on their bottles. Rolling Rock puts this 33 on their bottles as a tribute to the repeal of Prohibition. This mathematically significant roadsign identifies “33″ as a tribute to Rolling Rock.

Excuse the bug splatter on the window!

The math on this sign was made more complicated due to the ruling change regarding rule #4. Previous to that rule, the I35 indicators would be excluded from the math leaving a very elegant solution. However, now these must be included. Luckily we are able to easily cancel them out.

This sign was found in Minnesota heading southbound on I-35 heading toward the Twin Cities. The GPS coordinates are approximately N45 22 54.1 W92 59 32.8. See sign on map!

Ed.: This sign is the 75th mathetmatically significant roadsign!

Dave Oosterhuis and his wife Phoebe captured this sign on a recent trip to Iowa City for homecoming. Dave would like to express excitement for the event with a splendid “Go Hawks“. It excites me greatly though that another couple are sharing in the enjoyment of hunting mathematicaly signficant roadsigns. As the old saying goes, couples that do math together, stay together.

The math on this sign is as easy as “falling off a log”. The size of the numbers and the lack of anything to distract your attention make this sign nearly glow in it’s mathematical obviousness.

This sign was found in Minnesota heading southbound on highway 52 just before the Pine Island. The GPS coordinates are approximately N44 13 00.2 W92 38 55.5. See sign on map!

Rosalin Chrest found her 2nd 3rd winning sign returning to the Twin Cities on a road trip with her son, the founder of Road Sign Math, and family. Kudos to her for spotting this sign before her son got it. This sign presents it’s numbers in a way that would make Joe Friday happy. There are no city names, nothing to draw us away from these blazing numbers.

The math on this sign is very straightforward, but due to the size of the numbers it is easily overlooked. The 5 + 36 = 41 is missed by the casual driver.

This sign was found in Minnesota on I-94 heading eastbound towards the Twin Cities, at exit 205. The GPS coordinates are approximately N45 13 13.7 W93 35 58.5. See sign on map!

Ed.: This is the 5th sign for Minnesota, placing it in a tie with New Mexico for the 3rd most signs of any state. Pennsylvania still dominates first place however with 12 signs, twice as many as 2nd place Massachusetts.

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 not obvious. However, doing a couple of calculations you see some relationships that shine.

This sign was found on I-94 just before Fergus Falls, heading westbound towards North Dakota, in Minnesota. The GPS coordinates are approximately N46 11 46.6 W95 59 48.5. See sign on map!

Long before the game of finding mathematically significant road signs, this sign used to always catch my eye. Black Dog Road. It sounds like a place where some mystery happened years ago. If you were sitting around a campfire with your grandpa you could easily envision him whipping out a story about the Ghost on Black Dog Road. This entire scene is filled with stories waiting to happen. Burnsville itself brings overtones of fire. Add to that Cliff Road and you’ve got the ingredients for a great ghost story. Maybe even a ghostly poem of terror.

The math here is a little elusive. We can remove the A and B from 4A and 4B and just use them as fours. Your eye can get distracted with the 2nd 4B and 15 MPH signs, however, they are independent signs and do not invalidate our main sign. After clearing these unrelated signs and leaving the stories of mysterious black dogs behind, the math becomes clear.

This sign was found on 35W Southbound heading towards Burnsville, in Minnesota. The GPS coordinates are N44 47 52.8 W93 17 22.4. See sign on map!