Step 1: Understanding the different types of road markings.
Longitudinal markings on the road are primarily used to guide the flow of traffic and inform drivers about overtaking restrictions. Broken lines allow overtaking, while solid lines usually indicate restrictions.
Step 2: Analyzing the options.
(A) A broken longitudinal line allows overtaking: This is correct because a broken line usually indicates that overtaking is permitted in the area.
(B) A solid longitudinal line always permits overtaking: This is incorrect because a solid line typically indicates a restriction on overtaking.
(C) Longitudinal markings are meant only for aesthetics: This is incorrect. Longitudinal markings serve practical purposes related to road safety and traffic management.
(D) Double solid lines may be crossed when overtaking a slow-moving vehicle: This is incorrect because double solid lines are a strict prohibition on overtaking, regardless of the vehicle’s speed.
Step 3: Conclusion.
The correct answer is (A) because a broken longitudinal line allows overtaking, which is a commonly understood rule.