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Scott's Law, 625 ILCS 5/11-907(c), is a mandatory move over law in the state of Illinois. [1] The law requires that all motorists move over when encountering stopped or disabled emergency vehicles displaying warning lights. [2]
Blue lights alone may be used to secure the site of an accident (or a standing emergency vehicle). Sometimes, columns of emergency or police vehicles use blue lights (without the two-tone horns) to make the column more visible to other vehicles. [39] Blue and yellow are the only colours of flashing lights legal for use on moving vehicles.
When it was initially published in 1968, [10] Motor Vehicle Safety Standard No. 108 was part of 49 CFR 371.21, incorporating several SAE recommended practices by reference. [11] The 1969 version of FMVSS 108 allowed the use of two headlamps, each 7 in (180 mm) in diameter, or four smaller 5 + 3 ⁄ 4 in (150 mm) headlamps. [11]: Table I
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The emergency stop signal is automatically activated if the vehicle speed is greater than 50 km/h (31 mph) and the emergency braking logic defined by regulation No. 13 (heavy vehicles), 13H (light vehicles), or 78 (motorcycles) is activated; the ESS may be displayed when a light vehicle's deceleration is greater than 6 m/s 2 (20 ft/s 2) or a ...
How you can signal to someone that their headlights are off when it’s dark.
In other states, law enforcement officers give citations for headlight flashing under three types of laws: (1) laws prohibiting a person from obstructing a police investigation, (2) laws prohibiting a person from having flashing lights on their vehicle, and (3) laws prohibiting shining a vehicle's high beams at oncoming traffic.