AARoads Forum

National Boards => General Highway Talk => Traffic Control => Topic started by: empirestate on April 14, 2017, 11:29:52 AM

Title: Which states have reference markers (and what do they mean)?
Post by: empirestate on April 14, 2017, 11:29:52 AM
(Intending to compile this information into one place...)

Which states have some kind of reference marker or similar device posted on public roads, bridges, etc.? What information do they contain, and how are they interpreted?

By "reference marker", I mean something more specific than mile markers (there's already a thread for different states' use of those). Reference markers would be used mainly for internal purposes, such as location referencing, data recording, or inventory. Many states will have implemented them as part of an LRS program (linear [or "location"] referencing system). They will typically display a route number along with some other location information. Also in this category would be things like California's structure identification signs, which pertain specifically to overpasses, bridges, etc., but also contain the route number and some location information.

Tell us about your state's system, and post any links to existing threads or other information.

My state, New York, probably has the most high-profile system of reference markers:
https://www.aaroads.com/forum/index.php?topic=6842 (https://www.aaroads.com/forum/index.php?topic=6842)
https://www.dot.ny.gov/divisions/engineering/design/dqab/rmm (https://www.dot.ny.gov/divisions/engineering/design/dqab/rmm)

Vermont has a similar system, at least in appearance:
https://www.aaroads.com/forum/index.php?topic=6752 (https://www.aaroads.com/forum/index.php?topic=6752)

Pennsylvania has segment markers as part of its LRS:
http://www.dot.state.pa.us/public/PubsForms/Publications/PUB%20664.pdf (http://www.dot.state.pa.us/public/PubsForms/Publications/PUB%20664.pdf)

What else?
Title: Re: Which states have reference markers (and what do they mean)?
Post by: hotdogPi on April 14, 2017, 11:49:03 AM
New Hampshire has some, but very little is known about them.
Title: Re: Which states have reference markers (and what do they mean)?
Post by: empirestate on April 14, 2017, 11:30:00 PM
Quote from: 1 on April 14, 2017, 11:49:03 AM
New Hampshire has some, but very little is known about them.

Well, what's the little that is known?


iPhone
Title: Re: Which states have reference markers (and what do they mean)?
Post by: Scott5114 on April 15, 2017, 03:01:23 AM
Oklahoma DOT has three-line ones, which are often placed on the backs of stop signs along a state highway, and at other places like bridges over streams. They are of the format:

44
19
3.13

Which means: county #44 (alphabetically, Adair County is 1, Woodward County is 77, 44 = McClain County)
control section #19 (each control section is a segment of road numbered uniquely within that county only, which typically follows a numbered route but ends at some junctions, always ends at county lines, and often ignores concurrencies)
3.13 miles from the south/west end of the control section