Effects of Fire Compartmentation and Smoke Exhaust Measures on Smoke Spread Caused by Cable Fire in Utility Tunnel

Table 10

Comparison of visibility changes under working conditions 1, 4, and 5.

Time	400 s (m)	500 s (m)	700 s (m)
Working condition 1	16.3	7.0	3.0
Working condition 4	17.0	8.5	4.4
Working condition 5	16.5	7.5	3.8