IEVref:845-31-084ID:
Language:enStatus: Standard
Term: transition zone, <of a road tunnel>
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Definition: part of a road tunnel that follows directly after the threshold zone and ends at the beginning of the interior zone

Note 1 to entry: In the transition zone, the lighting level is decreasing from the level at the end of the threshold zone to the level of the interior zone.


Publication date:2020-12
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