Road markings – meaning of broken white longitudinal lines What is the correct interpretation of broken (discontinuous) white longitudinal pavement lines for drivers?
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AThey are for general guidance of drivers only
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BThey are not to be crossed over
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CThey may be crossed over at the driver’s discretion when safe
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DAll the above
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ENone of these
Answer
Correct Answer: They may be crossed over at the driver’s discretion when safe
Explanation
Introduction / Context:Pavement markings communicate lane usage and overtaking permissions. Broken white longitudinal lines are among the most common road markings and must be understood for safe operations.
Given Data / Assumptions:
- Broken (dashed) white line separating same-direction lanes or guiding a single carriageway.
- Normal daylight and visibility conditions; other signs and markings may also apply.
Concept / Approach:Broken white lines indicate that lane changing or overtaking is allowed when safe, after adequate observation and signaling. In contrast, continuous lines typically prohibit crossing.
Step-by-Step Solution:
Interpret marking type: broken white → permissive.Evaluate safety: check mirrors, blind spots, opposing/adjacent traffic.Execute maneuver only if adequate sight distance and gaps exist.Verification / Alternative check:Traffic control manuals uniformly classify broken white lines as permissive lane lines; solid lines are restrictive or warning-based.
Why Other Options Are Wrong:Option A is incomplete (does not specify permissive crossing). Option B contradicts standard meaning. Option D cannot be true since B is incorrect. Option E is inapplicable.
Common Pitfalls:Crossing near intersections or pedestrian crossings without extra caution; ignoring additional signs that might temporarily restrict overtaking.
Final Answer:They may be crossed over at the driver’s discretion when safe