Clinched Highway Mapping

Jeff Morrison · Joined: 03 Aug 2008 Posts: 620

From a field check and as marked on Google Maps (but not satellite view). There was even a low power AM station warning about it.

The last eastbound exit, 275, now leaves I-69/94 before the Black River and parallels the interstate until coming to a T-intersection south of the interstate. There is no longer a left exit. However, there is still a southbound-to-westbound entrance, and still a westbound exit from traffic that just crossed from Canada.

This brings up a weird situation for the business loops. Westbound, BL 69/94 comes up Pine Grove Avenue, turns left on Hancock Street for 2 blocks, and turns left again onto the westbound onramp. (Although oddly, this westbound exit meets signs that say "TO BL 69/94" pointing to Hancock Street.) Traffic exiting from EB 94/69 only sees the business loop signed heading south from the intersection south of the interstate.

There is still an exit in the point currently marked as 275, but eastbound traffic exits the mainline a distance before. I don't know if that is something that should be taken into consideration, but I wanted it to be known.

Finally, there's a bit of point drift in the business loop file and both the south end of M-25 (Pine Grove/Hancock) and the south 69/94 BL split are not quite aligned to the intersections.

dfilpus · Joined: 14 Jul 2008 Posts: 717 Location: Chapel Hill NC

Currently there are three interchanges in the mapper on I-95/I-69, which were be affected by the reconstruction. Interchange 274 is for the Lapeer Connector. Interchange 274A is for Water Street. Interchange 275 is for Pine Grove Avenue. Even though some of the movements have been removed, these three interchanges still exist as points at which one can enter or exit the interstate.

Since the mapper documents interchanges, not individual movements within an interchange, the changes in the configuration of the interchanges do not affect the mapper.

The waypoint for the endpoint of MI 25 is slightly off the intersection. However, with the reconfiguration of the interchange, fewer of the movements of the Business Loops pass through that point. It would be more accurate if that waypoint were to be removed from the Business Loops,
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Dave Filpus
http://roadgeek.filpus.org/