Highest numbered county postmile?

[Kniwt]

As I was driving north on US 93 through Lincoln County NV today, I watched the postmiles get bigger and bigger and bigger until the White Pine County line, where the final count was:


At first, I thought that might be the highest postmile anywhere. But then I remembered I-15 in San Bernardino County, right inside the Nevada state line:


So, my question: Are there any that are bigger?

[Max Rockatansky]

The only one that I can think of that competes at that level is the 156 miles of I-40 all in San Bernardino County, CA also.  Basically US 95 and US 6 jump around counties too much in Nevada to get really close in Esmeralda or Nye.   I-10 is about 155 in Riverside County, CA also....  It's going to be hard to find something of that size elsewhere besides the West Coast. 

Oh wait...US 191 in Apache County, AZ is something like 260 miles.  I can't find the exact figure but I adhoc ran a route from the Utah State Line to Alpine near the Greenlee County Line.

[roadfro]

The first picture represents the highest county milepost in Nevada, based purely on mileage within a county.

At the US 95 & US 6 junction in Tonopah, US 95 has a Nye County milepost with a number somewhere in the low 150's...but it isn't a true reflection of mileage in the county. US 95 crosses from Nye to Esmeralda counties with a NY milepost in the 105+ range, then spends 40+ miles in Esmeralda County with ES mileposts, then crosses back into Nye County approaching Tonopah but the mileposting picks up as if US 95 never left Nye County. It's less than 2 miles posted this way from Nye County line to the US 6 junction, at which point US 95 takes on the US 6 mileposts.

Next highest in Nevada based on actual mileage would be one of these: US 95 in Clark County, US 6 in Nye County and US 93 in Elko County (all are ~130 mi, if memory serves).

[hbelkins]

What is this "postmile" to which you refer? That is a foreign term in Kentucky. Around here, we call them "mileposts." 

[Kacie Jane]

What is this "postmile" to which you refer? That is a foreign term in Kentucky. Around here, we call them "mileposts." 

It's always been curious to me that states that call them "postmiles" also seem to be the ones that reset them at county lines.

[Kniwt]

What is this "postmile" to which you refer? That is a foreign term in Kentucky. Around here, we call them "mileposts." 

The secret postmile code: http://www.cahighways.org/num-postmiles.html

[vdeane]

The highest reference marker mileage in NY is 92 point something on NY 27 in Suffolk County; our counties just aren't as big here as out west (of course, our reference marker mileages also reset at city lines, further decreasing the totals, but many of the biggest counties don't have cities).

[roadfro]

What is this "postmile" to which you refer? That is a foreign term in Kentucky. Around here, we call them "mileposts." 

It's always been curious to me that states that call them "postmiles" also seem to be the ones that reset them at county lines.

I think California is the only state that officially calls these "postmiles".

Nevada DOT uses a mileage inventory system virtually identical to Caltrans, except the county codes are two letters and mileage prefix codes are not used. However, NDOT officially refers to their version as "mileposts". The MUTCD-style mileposts are only used in Nevada on Interstates, (currently only on I-15 and I-80, with enhanced versions installed on I-215/CC-215 by Clark County), but NDOT refers to the MUTCD version as "reference panels"–this is likely because the official name of these signs in the MUTCD is "reference location panel".

[hbelkins]

Kentucky resets them at the county line for all except interstates and parkways, and here they're more or less officially called mile marker, and informally called milepoints or mileposts.

Highest one I can think of is KY 194 in Pike County, which runs for 72.819 miles (and yes, I've driven it all.)

[kkt]

I-15 in San Bernadino County just before the Nevada state line has milepost 186.xx, where xx is something Google has blurred. 

[Eth]

Kentucky resets them at the county line for all except interstates and parkways, and here they're more or less officially called mile marker, and informally called milepoints or mileposts.

Same in Georgia, except swapping out "parkways" with, uh, GA 400.

Georgia's "winner" would likely be SR 23 in Charlton County, with mileposts reaching as high as 51. Our counties are too small to get anything much higher than that (though if you could combine SR 9 and SR 14 into one route, the result would probably beat that in Fulton County).