page_title: Speed limits in the United States
section_title: Night speed limits
hierarchical_section_title: Speed limits in the United States / Night speed limits
caption_attribution_description: Deutsch: Unterschiedliche Geschwindigkeitsbegrenzungen für Tag und Nacht auf den Florida Keys (im Key Deer Schutzgebiet). Die Nummer 45 im oberen Schild ist auf einem nicht reflektierenden Hintergrund aufgebracht. Bei Nacht ist für vorbeifahrende Autofahrer im Scheinwerferlicht nur die untere (reflektierende) 35 zu sehen. English: Different speed limits apply for day and night time on this stretch of the U.S. Highway 1 on the Florida Keys (in a Key Deer habitat). Note the nonreflective backing of the day speed limit number. At night only the number on the lower sign is visible in the headlights.
context_page_description: Speed limits in the United States are set by each state or territory. States have also allowed counties and municipalities to enact typically lower limits. Highway speed limits can range from an urban low of 20 mph to a rural high of 85 mph. Speed limits are typically posted in increments of five miles per hour. Some states have lower limits for trucks and at night, and occasionally there are minimum speed limits.
  The highest speed limits are generally 70 mph on the West Coast and the inland eastern states, 75–80 mph in inland western states, along with Arkansas and Louisiana, and 65–70 mph on the Eastern Seaboard. Alaska, Connecticut, Delaware, Massachusetts, New Jersey, New York, Puerto Rico, Rhode Island, and Vermont have a maximum limit of 65 mph, and Hawaii has a maximum limit of 60 mph. The District of Columbia and the U.S. Virgin Islands have a maximum speed limit of 55 mph. Guam and the Northern Mariana Islands have speed limits of 45 mph. American Samoa has a maximum speed limit of 30 mph. Two territories in the U.S. Minor Outlying Islands have their own speed limits: 40 mph in Wake Island, and 15 mph in Midway Atoll.
context_section_description: The basic speed rule requires drivers adjust speeds to the conditions. This is usually relied upon to regulate proper night speed reductions, if required. Numeric night speed limits, which generally begin 30 minutes after sunset and end 30 minutes before sunrise, are occasionally used where, in theory, safety problems require a speed lower than what is self-selected by drivers.
  Examples include:
  Some streets in Tucson, Arizona, without street lights.
  Some roads along Interstate 90 in Montana
  Some Florida roads near Southwest Florida International Airport near Cape Coral/Fort Myers. (Most of these roads are labeled as "Panther Zones" or "Panther X-ing" areas.)
  Daniels Parkway Ext., a four-lane divided highway near SW Florida International Airport with a 50 mph (80 km/h) daytime limit, and a night speed limit of 45 miles per hour (72 km/h) is considered by many to be a speed trap. This road joins neighboring SR 82, a two-lane road with a 60 mph (97 km/h) speed limit.
  Colorado Highway 13, with a 65 mph (105 km/h) day/55 mph (89 km/h) night speed limit beginning 7.1 mi (11.4 km) north of I-70 from north of Rifle to Colorado Highway 64 south of Meeker. Rural Colorado Highway 13 is 55 mph (89 km/h) at night north of Meeker all the way to the Wyoming state line.
  Highway 20 in Washington state between Twisp and Pateros  has a 45 mph (72 km/h) speed limit due to high numbers of deer (and other wildlife) activity. Deer carcasses can be seen along the road all throughout summer
  Some states create arbitrary night speed limits applicable to entire classes of roads. Until September 2011, Texas had a statutory 65 mph (105 km/h) night speed limit for all roads with a higher limit. Montana has a statutory 65 mph (105 km/h) night speed limit on all federal, state, and secondary roads except for Interstates.
caption: Night speed limit sign in the Key Deer habitat on the Florida Keys has nonreflective backing for day speed limit number so that at night, headlights make only the number on the lower sign visible
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