Home / Newfoundland and Labrador / Questions / Road Signs Road Signs Report A yellow diamond with a truck on a slope means: A Speed zone B Steep grade ahead — engage lower gear for engine braking C Slow traffic D Load limit Show Answer & Explanation Correct Answer: B. Steep grade ahead — engage lower gear for engine braking Prevents brake fade on descents. Previous Next More Road Signs Questions A yellow diamond with an arrow curving to the left means: A yellow sign with speed limit and children playing means: A white X-shaped sign with 'RAILWAY CROSSING' text means: A yellow pentagon with a walking figure means: A yellow pentagon with two children walking means: Often Missed All Newfoundland and Labrador Questions Smart Practice Mock Exam Road Signs Guide