A 3-minute lesson from the Oregon course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
A second group of yellow signs warns about lanes joining or ending, controls you'll meet ahead, and road conditions that call for less speed. Most tell you to slow down and get ready before you reach the hazard.
Lane and traffic-flow signs
Merge: traffic is merging from the side shown
Add Lane: two roadways join together — you do not need to merge
Lane Reduction: the indicated lane ends soon; vehicles in it must merge into the through lane
Two-Way Traffic Ahead: the one-way road joins a two-way road — you'll face oncoming traffic
Divided Highway Begins or Ends: the divided highway begins or ends — keep to the right
Stop Ahead: there's a stop sign ahead — slow down and prepare to stop
Advisory Speed: advises the safe speed for freeway ramps and curves. It may be used with other signs, and it may be electronic and change based on current conditions.
Railroad AdvanceLow ClearanceAdvisory exit speedSlippery When Wet
Put it into practice
A yellow sign shows a lane line ending, and you're in the right lane that stops. That's Lane Reduction: you must merge into the through lane. If the sign instead shows two roads joining (Add Lane), you keep your lane with no need to merge.
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.
An Add Lane sign means:
Two roads join; no merge is needed
You must merge immediately
A lane is closing ahead
The right lane ends and you must merge left
Answer: Two roads join; no merge is needed
An Add Lane sign means a new lane forms; merging is not required.
