Travel Mapping

Highway Data Discussion => Updates to Highway Data => Solved Highway data updates => Topic started by: rickmastfan67 on August 10, 2023, 04:52:03 am

Title: AZ: I-10 Exit 257A
Post by: rickmastfan67 on August 10, 2023, 04:52:03 am

Is this 'exit' really necessary?  No ramps to Saint Mary's Road, and everything around it are 'proper' interchanges with the normal 4 ramps for them.

Was there formally any ramps here?  If so, then should give it the * instead.

Title: Re: AZ: I-10 Exit 257A
Post by: Duke87 on August 11, 2023, 03:05:15 pm

1996 aerial shows two 3/4 diamond interchanges in the locations of the 257 and 257A points, with each direction getting offramps in both places but an onramp only from the downstream crossroad. By 2003 the current configuration with 4 ramps at the location of exit 257 was in place.

So yeah, warrants a *, certainly. When both exits existed though, it probably would have been 257B, so hm... gotta mull over what's actually the correct label.