Mile markers for concurrencies

[hbelkins]

I see the MUTCD left it up to the states to decide which route gets the mileage markers when they are of equal stature. Anyone know any states that deviate from the lower number getting preference?

In Kentucky, I-75's numbers take precedence over both I-64 and I-71 in their concurrencies.

For concurrencies of US and state routes, the US route takes precedence. For two US routes or two state routes, the lowest-numbered route gets precedence.

Given that Kentucky no longer officially recognizes concurrencies (and in some places is no longer signing them), this makes for some odd route descriptions.

[roadfro]

Anyone know any states that deviate from the lower number getting preference?

I mentioned US 95 controlling over US 93 (and I-515) through Henderson/Las Vegas, with mileposts and exit numbers.

In Reno and Carson City, the mileposts say I-580 but the exit numbering is based off US 395.


Nevada DOT's policy now is to have the lower number on the mileposting–and this is the case with all the other US route overlaps in the state. In both of these cases, the freeways existed before the Interstate was signed and the US route is the through route for exit numbering purposes. (Also worth noting is that mileposts are scarce on both these facilities, especially US 95. They are the small style similar to California Postmiles, not really meant for traveling public.)

There are exceptions to this. For example, on the I-515/US 93/US 95 overlap through Las Vegas, it is US 95 that controls for mileposts and exit numbers--this is because US 95 is the through route on the freeway where US 93 turns off to follow I-15, and both highways existed on this alignment many years before I-515 was designated and signed. (An interesting note is that the same overlap is inventoried internally by NDOT as I-515, even though mileposted as US 95.)

How will this work If I-515 is used as I-11.

Still a big "if", because I-11 could follow the 215 beltway instead.

But hypothetically, if I-11 followed I-515, it would basically be taking over I-515 and US 95 through Las Vegas. At that point, I would expect the freeway would get new mileposts and exit numbers to follow I-11 instead. (And, in actuality, there has been a mileage/milepost/exit number discontinuity somewhere on US 95 around Las Vegas for many years that hasn't been reconciled, so exit renumbering is needed anyway.)