AARoads Forum

National Boards => General Highway Talk => Topic started by: KCRoadFan on December 06, 2021, 06:38:49 PM

Title: Distance-based exit numbers LOWER than the sequential numbers they replaced
Post by: KCRoadFan on December 06, 2021, 06:38:49 PM
I was just thinking about the various states that, over the years, switched from sequential to distance-based exit numbers (namely, Georgia, Pennsylvania, Florida, Maine, and now most recently, Massachusetts), and about how some of the interstate highways in those states - such as I-95 in Florida (through Miami) and I-93 in Massachusetts (through the Boston area) - had enough closely-spaced exits at the start such that, when the numbers were converted, the new distance-based numbers on some of the exits were actually lower than their sequential predecessors. Aside from those two highways, were there any others with exit numbers like that?
Title: Re: Distance-based exit numbers LOWER than the sequential numbers they replaced
Post by: SkyPesos on December 06, 2021, 08:03:24 PM
Not a whole highway, but looking at the exit list for I-75 in Ohio, the sequential exit numbers are greater than the distance based exit numbers from the KY line up to Tylersville Rd (exit 22, old exit 24). Then, there's a gap of 7 miles for the sequential exits (OH 129/Liberty Way exit didn't exist back then), so at the OH 63 exit, the distance based exit number exceeds the sequential number (29 vs 25)
Title: Re: Distance-based exit numbers LOWER than the sequential numbers they replaced
Post by: 1995hoo on December 06, 2021, 08:13:38 PM
The Capital Beltway in Maryland has a bunch of them because the original sequential exit numbers ran clockwise, but when Maryland switched to milepost-based numbering, the new exit numbers ran (still do) anticlockwise because of the presence of I-95 along part of the route and the use of south-to-north exit numbers on the 2di. Thus, for example, Exit 38 changed to Exit 2.
Title: Re: Distance-based exit numbers LOWER than the sequential numbers they replaced
Post by: jp the roadgeek on December 07, 2021, 03:45:39 PM
I-395 in CT are all lower because the sequential exits were a continuation of I-95 numbers from the CT Turnpike days.  And while still sequential, I-84 from East Hartford to the MA border is lower than the numbers from I-86/CT 15 days. 

All of the exits east of I-84 on CT 72 will be lower than the sequential ones they replace...because the exits will be numbered East-West instead of West-East in accordance with the road being logged North-South in the state Highway log. The same will happen with the easternmost exits of I-691 when converted for the same reason. All of the exits from New Haven into Wallingford on I-91 should be lower when converted. And of course, CT 15 numbers will be lower because the sequential ones are a continuation of the Hutch's former numbers (sort of).
Title: Re: Distance-based exit numbers LOWER than the sequential numbers they replaced
Post by: MikeTheActuary on December 07, 2021, 05:50:48 PM
The Hutch's new exit numbers qualify: https://scarsdale10583.com/section-table/30-neighborhood-news/9088-nys-department-of-transportation-renumbers-hutchinson-river-parkway-exits
Title: Re: Distance-based exit numbers LOWER than the sequential numbers they replaced
Post by: DJ Particle on December 07, 2021, 11:12:36 PM
I-195 in RI counts, and I-93 in MA as well...

CT-15 will eventually count once it's renumbered (as noted earlier)...I trust many freeways in the NYC area may as well.