Photo courtesy of David Backlin (taken November 2005)
In Shreveport, Louisiana, state route 3094 follows the former route of US 171 in much of the city. US 171 formerly extended to US 71 on the north side of Shreveport, but now ends at Interstate 20.
Louisiana normally uses square markers for its US highway shields. That's not a problem when two of the three digits are ones!