Q #417 - You're going through a long tunnel. What will warn you of congestion or an incident ahead?
Follow the instructions given by the signs or by tunnel officials. In congested tunnels, a minor incident can soon turn into a major one, with serious or even fatal results.
| Hazard warning lines | |
| Other drivers flashing their lights | |
| Variable message signs | |
| Areas with hatch markings |
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