Texas DMV cheat sheet: every number on the permit test

Speed limits

30 mph

Urban district, unless postedTable 22: Speed Limits

15 mph

AlleysTable 22: Speed Limits

70 mph

Numbered Texas or U.S. highways outside an urban district (passenger cars)Table 22: Speed Limits

20 mph below

Slow to this when passing a stopped emergency or TxDOT vehicle with lights on, if you can't change lanes (5 mph when the limit is under 25)Slow Down or Move Over

Distances

100 feet

Signal continuously before turning or stoppingSignals

2 / 4 seconds

Minimum following gap at 30 mph or less / above 30 mph in good conditionsFollowing Distance

500 / 300 feet

Use low beams within this distance of an oncoming vehicle / a vehicle you followNight Driving

15 to 50 feet

Stop this far from the nearest rail when a signal, gate or flagger warns of a trainRailroad Grade Crossings

500 feet

Do not follow a fire truck or ambulance answering an alarm closer than thisYield Right-of-Way to Emergency Vehicles

100 feet

No passing within this distance of an intersection, railroad crossing, bridge, viaduct or tunnelPassing

Parking

15 feet

No parking or standing within this distance of a fire hydrantDo Not Park or Stand a Vehicle

20 feet

No parking within this distance of a crosswalk at an intersectionDo Not Park or Stand a Vehicle

30 feet

No parking on the approach to a flashing signal, stop sign, yield sign or traffic signalDo Not Park or Stand a Vehicle

Alcohol

0.08

Legally intoxicated BAC at 21 and overAlcohol and Drugs

Any amount

Under 21: any detectable alcohol means suspensionSuspensions and Revocations (Under 21)

Rules people get wrong

• School bus with flashing red lights: stop from either direction and don't pass until the bus moves, the driver signals you on, or the lights stop. No stop is needed on a different road or on a controlled-access highway where pedestrians can't cross.
• Drivers under 18 may not use a wireless device at all — not even hands-free — except in an emergency.
• Move over: leave the lane next to a stopped emergency, tow or TxDOT vehicle with lights on, or slow to 20 mph below the limit.