page_title: Exit numbers in the United States
section_title: States that renumbered exits
hierarchical_section_title: Exit numbers in the United States / States that renumbered exits
caption_attribution_description: English: Interstate 4 east at exits 111A-B. Taken July 27, 2003 by User:SPUI.
context_page_description: In the United States, exit numbers are assigned to freeway junctions, and are usually numbered as exits from freeways. Exit numbers generally are found above the destinations of the exit, as well as a sign in the gore. Exit numbers typically reset at political borders such as state lines. Some major streets also use exit numbers. Freeway exits in the United States are usually numbered in two formats: distance-based and sequential.
context_section_description: Many states formerly used sequential numbers, and in some cases used exit numbers sparingly, if at all. The following states have introduced mile-based exit numbering on some or all of their highways:
  California – Began widespread exit numbering in January 2002, although some exits in Los Angeles received mile-based numbers in the 1970s. California was the only state not to require exit numbers or mileposts, because most of their highway system was built prior to the enactment of the federal requirement. Before adopting exit numbering, California relied on its system of county-based mileposts on all highways, without having explicitly numbered exits. Originally, the initial completion date for installing exit numbers statewide was set for November 2004. But because of California's budget concerns, exits (especially in the Greater Los Angeles and San Francisco Bay areas) have generally been numbered only when signs needed to be replaced. The state may eventually replace all older overhead signs (and thus add exit numbers) as part of an energy-saving measure: in 2014, Roads & Bridges reported that the California Department of Transportation was testing types of reflective sheeting to eliminate the need for electrical-sign lighting.
  Colorado – Initially sequential; used dual mile/sequential plates in the mid-1970s.
  Connecticut – Started a gradual transition from sequential to mileage-based exit numbers in 2015, with SR 695 and I-395 converted that year, and Route 2A in early 2016 under the same contract. The next freeways to be converted to mileage-based exit numbering will be Route 72 and SR-571 starting in 2020, Routes 9 and 82 in 2021; Routes 2, 3, 11, and 17 in 2022;followed by Routes 8 and 25, also tentatively scheduled for conversion starting in 2022; and I-691 planned for 2023. Two short freeways whose exits were previously unnumbered, Route 184 and Route 349 in Groton received mileage-based exit numbers starting in 2018 as part of a sign replacement project that includes I-95 from New London to the Rhode Island state line (this section of I-95 will retain sequential exit numbers for the time being until signs along the entire length of I-95 are updated and ready for conversion). Route 40 has only one, sequentially-numbered, exit (Exit 1); it would not need to be "changed" to a mile-based number as it is located around milepost 1. Exit numbers on other highways will be converted to mile-based numbering by 2030 as existing highway signs reach the end of their serviceable life and are replaced with new signage. As highways are converted to mile-based exit numbers, sequential numbers will be posted on "Old Exit XX" placards on advance guide signs and gore signs for at least two years following the conversion.
  Florida – Began January 28, 2002; now complete. However, I-110 retained its sequential exit numbers.
  Georgia – Began January 4, 2000, now complete; no "former exit" signs were used in the renumbering. (Interstate highways only).
  Illinois formerly did not number exits on its original Illinois Tollways, including those overlaid with Interstate highways.  Starting with Interstate 355 (a toll road from its inception in 1989), toll roads began to be numbered according to standard mile-based exit signage.  From the 1990s through the 2010s, Illinois gradually added exit numbers to its remaining toll interstates.
  Indiana – Around 1980.  Exits on I-69 between Indianapolis and the Michigan state line underwent a second renumbering in 2012, when the first portion of the I-69 extension to Evansville opened that year.
  Iowa – Adopted distance-based exit numbering in 1977.
  Maine – Early 2004 (experimented with dual exit/mile tabs in the 1970s).  Sequential exit numbers were retained for two years on yellow "Formerly Exit XX" placards below advance guide signs, which have since been removed.
  Maryland - All interstates (except I-695 and I-83) use mileage-based exits except for the unsigned Interstate 595, it uses miles based on concurrent US Route 50 starting with the District of Columbia border.
  Massachusetts had planned to start 
caption: Mile-based exit numbers on Interstate 4 in Volusia County, Florida circa 2003. In this case, mile-based exits 111A and 111B had been sequential exits 53CA and 53CB, as the 'OLD 53CA' tab shows. The 'OLD 53CA' tabs have been removed and the signs now solely use the mileage based exits.
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