Portal:U.S. roads/Did you know/May 2019

...that, according to the Michigan Department of Transportation, the first highway centerline in the US (pictured) was painted on the first designation of M-15 in 1917?
... that none of State Highway 32 as it was originally designated through southwestern Oklahoma in 1934 is a part of the current route?
...that speed limits on Guam Highway 1 may differ depending on which side of the road you are on?
...that in the 1950s, four service plazas on the Garden State Parkway had uniformed female employees known as the "Park-ettes" whose duties included providing directions and other information to motorists as well as rendering odd bits of service such as sewing a missing button on a patron's coat?
...that California State Route 174, which includes a historic 1924 bridge, was not designated a State Scenic Highway due to opposition by residents concerned about their property rights?