They don’t call ’em “high”ways for nothin’.

Earlier today, Reddit user cluckinho shared a fun fact about our nation’s highway system: On Interstate 70, Colorado’s sign for mile marker 420 was replaced with a sign labeled “419.99” because the 420 sign kept getting stolen.

https://instagram.com/p/7oaRyVOPxC/

The state’s Department of Transportation switched out the sign back in January 2014. (Another frequently stolen sign? The “69” mile marker, which apparently moved up the road to “68.5” to discourage a similar series of immature thieves.)

Other states have followed Colorado’s lead to distance themselves from the reefer reference.

Most recently, Idaho jumped on the bandschwagon by planting a 419.9 sign on Highway 95. The trend became so extensive that the Washington Post published a helpful guide to the remaining 420 signs in the United States, which probably only helps kush-loving kleptos figure out which mile markers to collect next.

Novelty sign theft isn’t limited to the US, of course, or to signs with numerical drug references.

Earlier this year, Redditor TorgueFlexington shared that the small Austrian town of Fucking suffered a severe bout of sign theft in the mid-’00s after English-speaking foreigners learned of the town’s existence. Giggling visitors stole town signs and, according to the Daily Star, even filmed themselves having intercourse with the sign visible in the background—prompting the town to install CCTV to monitor the signs.

https://instagram.com/p/2_1_1GnwZh/

(Despite the ongoing grief the town endures because of its name, Reuters reports that a name change is “not under discussion,” according to the Fucking mayor.)

In the US, the Federal Highway Administration (FHA) outlines a number of solutions to prevent street sign theft in their guide for highway maintenance workers, but for those juvenile enough to find “420” funny, some of these anti-theft measures may only provoke snickers.

In a diagram, the FHA explains one way to stop thieves: put two tufnuts together.

But perhaps the US should put its tufnuts together and find a new solution to this recurring problem.

Instead of beefing up security with anti-vandal fasteners or going through the trouble of reducing signs by 1/10th of 1/100th of a mile just to avoid numbers that appear in Urban Dictionary, maybe Americans should look to Canada for inspiration.

When the residents of Yellowknife, Canada continued to get their signs stolen for Ragged Ass Road, they responded by selling replica signs as souvenirs for tourists—embracing the joke and making money in the process.

The problem obviously stems from people finding the 420 signs funny, so getting in on the joke could offer the seed of a solution.

Colorado’s 2014 decision to replace the mile marker may’ve missed an opportunity for the town nearest to the sign—Stratton—to have a thriving gift shop. They could’ve sold signs, T-shirts, bumper stickers, tote bags, mugs, visors, magnets, scales, lighters, grinders, rolling papers, blunt wraps…

For now, let’s hope that collectors of marijuana memorabilia rolling by Stratton in hopes of stealing a 420 sign don’t vent their frustrations on nearby Stratton residents—because according to Google Maps, almost every street in town has an address with the number 420.