portion of I-210 now known as SR 57 still remains on the Interstate Highway System federally defined as Interstate 210 maintaining its connection to I-10, but it is not signed as per Caltrans tradition to sign state highways by their state definition over their federal definition. State Route 210, built as an extension to replace Route 30, connects to I-10 further east in Redlands, and California is petitioning to have that portion signed as I-210 as well. When that happens, this gap will close. I-238 does not have a parent. It was previously a part of California State Route 238 that was built to Interstate standards, and it was added to the Interstate system using the same number it had as a state highway. The exit numbers continue the mileage from the state highway instead of starting over from 1. None of the spurs of I-78 in New York City (I-278, I-478, I-678, I-878) connect to the parent road I-78, nor is there any surface-street with a state route designation with the same number that continues with a solid connection. I-78 was planned to extend southeast through New York City via the Lower Manhattan Expressway, Williamsburg Bridge and Bushwick Expressway, then east along what is now I-878 and north along what is now I-295. I-78 would have then split into two branches (the current I-295 and I-695), which would have both terminated at I-95. I-478 comes the closest, and would have intersected I-78 as part of the Westway project; this project was later canceled. I-278, the only I-78 spur to leave New York City, was planned to extend northwest to I-78 at Route 24. Since all the spurs are interconnected, only one of them needs to be eventually connected to its parent route for all of them to conform to numbering standards. I-585 in South Carolina currently does not connect directly to I-85. This is because until 1995, I-85 was routed along present-day I-85 Business. In that year, I-85 was moved to the north to bypass Spartanburg while I-85 Business took over its former route, leaving I-585 without a connection to its parent route until upgrades to the existing US 176 highway are complete. As of July 2022, I-587 in North Carolina doesn't connect with its parent route, I-87. Upgrades to the existing US 264 freeway from US 64 to I-95 to Interstate standards, as well as extending I-87 via