Side Road (Horizontal Alignment) Sign
A side road intersects from the left at an angle
What to do
Watch for vehicles entering from the left side road.
Tips
Be alert for vehicles that may not yield when entering from side road.
Test yourself
You see this sign while driving. What do you have to do?
Show the answer
Watch for vehicles entering from the left side road.
Common mistake
Not watching for traffic from angled side roads
About warning signs
Warning signs are diamond-shaped and yellow with black symbols. They alert you to hazards ahead — curves, intersections, crossings — so you have time to slow down. On the DMV written test, expect several questions asking what a specific warning sign means and what action it calls for.
Practice the rule this sign carries
How should you drive through a sharp curve?
- A. Enter the curve at full speed and brake mid-curve if needed
- B. Slow down before the curve and hold steady through it
- C. Accelerate mid-curve to generate centrifugal force for stability
- D. Brake hard just before the curve's apex
Show answer
B. Slow down before the curve and hold steady through it — Brake before a curve — not during. Braking in a curve shifts weight, reduces rear tire traction, and can cause sliding. Enter at a safe speed, then maintain or gently accelerate through the curve.
Universal rule · checked against NHTSA Safe Driving — Curve Driving · verified 2026-07-28
Frequently asked questions
What does the Side Road (Horizontal Alignment) Sign mean?
A side road intersects from the left at an angle
What should you do at a Side Road (Horizontal Alignment) Sign?
Watch for vehicles entering from the left side road.
Reference standard: Federal Highway Administration Manual on Uniform Traffic Control Devices ↗. State and local agencies may add rules or operating times, so follow the complete posted sign where you drive. How DMV Prep sources content.
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