roadwise.Open study app

Alabama driving lesson · Signs, Signals & Road Markings

Regulatory signs: speed, lanes and turns

A 3-minute lesson from the Alabama course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Signs, Signals & Road Markings
Checkpoint questions
4
Source pages
45, 46

Many regulatory signs control your speed, which lane you use and which turns you may make. You can be ticketed for ignoring them just as for running a stop sign.

Left lane must turn left
LEFT LANE MUST TURN LEFT

Know the rule

LEFT LANE MUST TURN LEFT: traffic in the left lane must turn left at the intersection ahead.

Handbook p. 45 ↗
Speed limit and minimum speed limit
Maximum and minimum speed limits

Know the rule

A sign showing both a speed limit and a MINIMUM gives the highest and lowest speeds allowed on that section. Minimum limits are usually posted on freeways and other controlled-access highways.

Handbook p. 45 ↗
School zone speed limit
School zone speed limit during the hours shown

Know the rule

A school zone speed limit applies during the hours indicated. It may also be shown on a lighted sign with flashing amber lights.

Handbook p. 46 ↗
Do not pass
DO NOT PASS

Know the rule

DO NOT PASS marks the beginning of a no-passing zone.

Handbook p. 46 ↗
No turn on red
NO TURN ON RED

Know the rule

At a signal-controlled intersection with this sign, you MAY NOT make a right or left turn on red.

Handbook p. 46 ↗
Keep right
Keep right of the island

Know the rule

This sign means you must not drive to the left of it.

Handbook p. 46 ↗
Right or straight lane
Right lane must turn right; the next lane may turn right or go straight

Know the rule

Double right turns are permitted only at intersections properly signed for them. Where there are no such signs, follow the normal rules for right turns.

Handbook p. 46 ↗

More regulatory messages:

  • SPEED LIMIT (e.g., 70): the limit as posted under normal conditions
  • SPEED LIMIT 30: 30 miles an hour is the top speed permitted in this area
  • NO TURNS: no right or left turn at this intersection
  • One-way arrow: you may travel only in the direction of the arrow
Handbook p. 45 ↗

Put it into practice

You're in the right lane approaching an intersection signed for double right turns. You must turn right. The driver in the lane beside you may turn right or go straight, so watch that car through the turn.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

A sign reading “NO TURN ON RED” at a signalized intersection means what?
  1. You may still turn right after a full stop
  2. No right or left turns on red here
  3. Left turns on red only from a one-way street
  4. No turns on red during rush hour

Answer: No right or left turns on red here

Where this sign is posted, you may not make a right or left turn on red at that intersection.

Handbook p. 46 ↗
A white rectangular regulatory sign reading “DO NOT PASS” marks the start of what?
  1. A construction zone
  2. A pedestrian crossing
  3. A no passing zone
  4. A one-way street

Answer: A no passing zone

This sign marks the beginning of a no passing zone.

Handbook p. 46 ↗
A sign showing “LEFT LANE MUST TURN LEFT” controls which drivers?
  1. All lanes approaching the intersection
  2. Only drivers in the right lane
  3. Only drivers in the left lane
  4. Only trucks and buses

Answer: Only drivers in the left lane

This sign means traffic in the left lane must turn left at the intersection ahead; it does not restrict other lanes.

Handbook p. 45 ↗
A speed limit sign showing “MINIMUM 45” means you may not legally drive slower than 45 mph on that stretch, under normal conditions.
  1. True
  2. False

Answer: True

Minimum speed signs, usually posted on freeways, mean driving below that speed is unlawful under normal weather, road, and traffic conditions.

Handbook p. 45 ↗
Take the lesson checkpoint in the app

More in Signs, Signals & Road Markings