Editing Exit number (section)

{{short description|Number assigned to a road junction}}
{{multiple issues|{{more citations needed|date=October 2013}}
{{Primary|date=January 2024}}
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[[Image:I-4 east exits 111A-B.jpg|thumb|right|Exit numbers on [[Interstate 4]] in [[Volusia County, Florida]]. In this case, mile-based exits 111A and 111B had been sequential exits 53CA and 53CB, as the 'OLD 53CA' tab shows.]]
[[Image:I-4 west exit 58.jpg|thumb|right|upright=0.64|On a road with distance-based exit numbering, the exit number (shown here on a [[gore (road)|gore]] sign) matches a nearby mile or kilometer marker.]]
[[Image:Puerto_RICO_HGW.JPG|thumb|right|[[Puerto Rico]] is the only place in the United States that uses Spanish like the "Salida 5B" sign.]]
An '''exit number''' is a number assigned to a [[road junction]], usually an exit from a [[freeway]]. It is usually marked on the same sign as the destinations of the exit. In some countries, such as the United States and Canada,<ref name=mutcd/> it is also marked on a sign in the [[gore (road)|gore]].

Exit numbers typically reset at political borders such as [[U.S. state|state]] lines.<ref name=mutcd>{{Cite book |author = Federal Highway Administration |author2 = National Committee on Uniform Traffic Control Devices |name-list-style = amp |date = May 2012 |chapter-url = https://mutcd.fhwa.dot.gov/htm/2009r1r2/part2/part2e.htm#section2E31 |chapter = Section 2E.31: Interchange Exit Numbering |title = Manual on Uniform Traffic Control Devices  |edition = Revised 2009 |location = Washington, D.C. |publisher = Federal Highway Administration |access-date = October 29, 2018|author-link = Federal Highway Administration |title-link = Manual on Uniform Traffic Control Devices }}</ref>

Some non-[[freeway]]s use exit numbers. An extreme case of this is in New York City, where the [[Grand Concourse (Bronx)|Grand Concourse]] and [[Linden Boulevard]] were given sequential numbers, one per intersection (both boulevards no longer have exit numbers as of 2011). A milder version of this has been recently used on the [[West Side Highway]], also in New York, where only the major intersections are numbered (possibly to match the planned exits on the cancelled [[Westway (New York)|Westway]] freeway). Another case is the [[Nanaimo Parkway]] in [[Nanaimo, British Columbia]], carrying [[British Columbia Highway 19|Highway 19]], where all exits are numbered though all except one are at-grade intersections. Some other intersections on Highway 19 outside Nanaimo are also given numbers.

As a means of educating motorists, some [[state highway]] maps include a brief explanation of the exit numbering system on an inset. [[Iowa Department of Transportation|Iowa DOT]] maps from the 1970s and 1990s included a picture or drawing of a [[milestone|milepost]] and briefly described how Iowa had included milepost references near interchanges on the map.