[chiph]

The last sign in the US that I saw marked in metric was one on northbound I-95 in South Carolina, just north of the I-26 interchange. The sign was replaced about 2 years ago with a new one that only shows distances in miles.

I suspect that metrication of the highway system in the US will only happen if a large state like California or Texas converts. But with the current budget situation, that's highly unlikely.

[xxpor]

The federal government has a law that federal funds can not be used to pay for signs with metric measures on them.

[benholmen]

Do you have a source for that?

[Torgo]

According to: http://www.fhwa.dot.gov/interstate/faq.htm

"the National Highway System Designation Act of 1995 prohibited the use of Federal-aid highway funds to convert existing signs or purchase new signs with metric units."

It appears from my reading of the law that the prohibition expired in 2000.

[xxpor]

Ha interesting. Didn't know abou that expiration.

[xxpor]

http://www.legistorm.com/score_gao/show/id/25766.html

"However, Congress passed legislation in 1994 and 1995 that prohibited federal funding for converting highway signs, such as those for speed limits, to metric units."