DMV Test
When to signal
100ft before turning
Five seconds (400 feet) before you exit or change lanes on the freeway
Use horn when you cannot see at least 200 feet ahead
Change from high-beam headlights to low beams within 500 feet of an oncoming vehicle OR 300 feet of a vehicle you’re following
Use headlights
Cannot see 1000 feet in front of you
30 minutes after sunset and before sunrise
You can only drive for 200ft in the center left turn lane
You can enter a bicycle lane when you are 200ft from the turn
U-turns
Yes: if no vehicles are approaching you within 200 feet
No: if you cannot see clearly for 200 feet in all directions
Merging / entering / exiting traffic you need a space that is
Half a block (150 feet) on city streets
A full block (300 feet) on the highway
Do not pass if you are within 100 feet of an intersection, bridge, tunnel, railroad crossing, hazardous area
Parking on a hill
Downhill: wheels to the curb (right side)
Uphill: wheels away from curb (left side)
Never park
Within 15 feet of a fire hydrant or fire station driveway
Within 15 feet of a crosswalk where there is a curb extension
Within 20 feet of a crosswalk (marked or unmarked)
Average breaking distance based on speed
Average passenger vehicle, 55 mph: 300 feet
Large vehicle, 55 mph: 400 feet
You cannot pass at more than 10mph when a bus, streetcar, or trolley is stopped at a safety zone or traffic light
You cannot follow any fire engine, law enforcement vehicle, ambulance, or other emergency vehicle with a siren or flashing light within 300 feet
Vehicles with an orange and red triangle travel at 25 mph or less
Bicycle visibility rules
Front white lamp: 300 feet
Rear red reflector, red light, or flashing red light: 500 feet
White or yellow reflector on each pedal, bicyclist’s shoes, ankles: 200 feet
Speed limit is 25 mph within 500 feet of a school while children are outside / crossing the street (some may have speed limits of 15 mph)
Speed limit for blind intersections: 15 mph
Alley: road no wider than 25 feet —> speed limit is 15 mph
Railroad or light rail tracks: 15mph within 100 feet and you cannot see the tracks for 400 feet in both directions
May want to drive faster than 15mph if the crossing is controlled by gates, warning signal, or flagman
Stop at least 15 feet from the nearest track
Business / residential districts: 25 mph
Scan road at least 10 seconds ahead of your vehicle
Speed based on road conditions
Wet road: reduce speed by 5-10 mph
Packed snow: reduce speed by half
Ice: reduce speed to no more than 5 mph
If you cannot see more than 100 feet ahead it is not safe to drive faster than 30 mph
Ride at least 10 inches from the airbag cover
Maximum speed limit on highways: 65 mph
Two-lane undivided highway / vehicles towing trailers: 55 mph
Illegal BAC levels
Over 21 years old: 0.08% or higher
Under 21 years old: 0.01% or higher
Any age, DUI probation: 0.01% or higher
Driving a vehicle that requires a commercial driver’s license: 0.04% or higher
Driving a passenger for hire: 0.04% or higher
0.05% or higher: require breath or blood test