interior zone, <of a road tunnel>
part of a road tunnel directly following the transition zone that stretches from the end of the transition zone to the beginning of the exit zone
Note 1 to entry: This entry was numbered 17-594 in CIE S 017:2011.
interior zone, <of a road tunnel>
part of a road tunnel directly following the transition zone that stretches from the end of the transition zone to the beginning of the exit zone
Note 1 to entry: This entry was numbered 17-594 in CIE S 017:2011.