mileposts and exit numbers in opposite directions

[Duke87]

Connecticut highway mileposts

What are these? I don't think I've ever seen one.

[Pink Jazz]

I think I-664 in the Hampton Roads area of Virginia has its exit numbers (which are sequential from north to south) in the opposite direction of its mileposts.

[kurumi]

Connecticut highway mileposts

What are these? I don't think I've ever seen one.

As distance notations in the highway log 

[bzakharin]

Supposedly it's because the east end is fixed but the west end keeps moving west.

You know, that's a pretty good idea. If one end of the road is unlikely to require renumbering (state line, ocean, etc), why not make that point milepost zero and number from there? Had that been done with I-195 in NJ, there would not be a proble extending it over the current I-95 as part of the PA Turnpike interchange project (yes, I know that there is room to extend it a bit to the east as well, but much less so than to the west). Maybe that's why the AC Expressway is numbered east to west.

[jeffandnicole]

Supposedly it's because the east end is fixed but the west end keeps moving west.

You know, that's a pretty good idea. If one end of the road is unlikely to require renumbering (state line, ocean, etc), why not make that point milepost zero and number from there? Had that been done with I-195 in NJ, there would not be a proble extending it over the current I-95 as part of the PA Turnpike interchange project (yes, I know that there is room to extend it a bit to the east as well, but much less so than to the west). Maybe that's why the AC Expressway is numbered east to west.

Technically, you really can't extend 195 west much either.  It's only an issue because they proposed to awkwardly redesignate 195 thru an interchange, change directions (EB goes SSW for a bit, and vice versa), then loop it around Trenton.  It'll be the same as if they decided to extended 195 eastward by redesignating the Parkway as 195 all the way south to Cape May.

[PHLBOS]

Supposedly it's because the east end is fixed but the west end keeps moving west.

You know, that's a pretty good idea. If one end of the road is unlikely to require renumbering (state line, ocean, etc), why not make that point milepost zero and number from there? Had that been done with I-195 in NJ, there would not be a proble extending it over the current I-95 as part of the PA Turnpike interchange project (yes, I know that there is room to extend it a bit to the east as well, but much less so than to the west). Maybe that's why the AC Expressway is numbered east to west.

Technically, you really can't extend 195 west much either.  It's only an issue because they proposed to awkwardly redesignate 195 thru an interchange, change directions (EB goes SSW for a bit, and vice versa), then loop it around Trenton.  It'll be the same as if they decided to extended 195 eastward by redesignating the Parkway as 195 all the way south to Cape May.

Such was mentioned in other-related threads, but I believe that the plan is now to keep I-195 in NJ as is and renumber I-95 north of the PA Turnpike as I-395.  Not sure whether this I-395 designation (likely an east-west route in NJ) will include I-295 north of I-195 as well.