Illinois Default Speed Limits
Default speed limits where no sign is posted: residential, urban, rural, school zones, and interstate maximums.
- Residential default (mph)
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30
Source: Illinois Rules of the Road 2025, Chapter 4: Speed Limits, p. 24
- Urban default (mph)
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30
Source: Illinois Rules of the Road 2025, Chapter 4: Speed Limits, p. 24
- Rural default (mph)
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55
Source: Illinois Rules of the Road 2025, Chapter 4: Speed Limits, p. 24
- School zone (mph)
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20
Source: Illinois Rules of the Road 2025, Chapter 4: Speed Limits, p. 24
- Interstate maximum (mph)
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70
Source: Illinois Rules of the Road 2025, Chapter 4: Speed Limits, p. 24
- Turning right (and left) on a red light
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Right on red is allowed statewide after a complete stop, unless a sign prohibits the turn. You may also turn left on red from a one-way street into a one-way street after stopping. After stopping you must yield to any vehicle already in or closely approaching the intersection and to pedestrians and bicyclists in the intersection or an adjacent crosswalk. 625 ILCS 5/11-306(c)3 states the rule for both turns in one sentence: except when a sign is in place prohibiting a turn and local authorities by ordinance or State authorities by rule or regulation prohibit it, traffic facing any steady red signal may cautiously enter the intersection to turn right, or to turn left from a one-way street into a one-way street, after stopping. Note the statute treats the sign and the underlying ordinance or rule as paired, so a lawful prohibition is posted at the intersection; Illinois has no jurisdiction-wide ban of the New York City type. Paragraph 3 is written as an exception to both paragraph 1 (steady circular red) and paragraph 2 (steady red arrow). One more Illinois-specific provision sits alongside it: paragraph 3.5 lets the driver of a motorcycle or bicycle who has stopped at a red that fails to change within a reasonable time of not less than 120 seconds, because of a malfunction or because the signal did not detect the vehicle, proceed after yielding, treating the signal like a stop sign.
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