To minimize the impact of
long-term following on safety and
operational efficiency in long (extralong) tunnels and tunnel groups on
mountain expressway, and to improve travelling comfort and experience, the
authors conduct statistical analysis on number of highway tunnels and the distribution
of typical tunnel lane changing schemes in Yunnan province, China. Then,
investigations and analyses are conducted on the Laoying extralong tunnel of
the Baoshan-Lushui expressway, the Huajiaoqing
extralong tunnel of the DaliRuili expressway, and the
Jiudingshan extralong tunnel of the ChuxiongDali
expressway. Based on traffic flow, linear indicator, accident distribution, and
driving needs, the minimum length of variable lanes in tunnels, the white solid
line length of prohibited lane changes at tunnel entrances and exits, and the
layout of variable lane sections in tunnel group sections are examined using
real vehicle driving test and driving simulation. The conditions for allowing
lane changes within the tunnel are as follows: (1) The white dashed lines
should be set between the lanes of extralong tunnels to allow lane changes,
white dashed lines can be set between the lanes of long tunnels to allow lane
changes, white solid lines should be set between the lanes of the middle tunnel
to prohibit lane changes, white solid lines must be set between short tunnel
lanes to prohibit lane changes, and spiral tunnels should be equipped with
white solid lines to prohibit lane changes. (2) The length of the white dashed
line in tunnel must not be less than 249 m and should not be less than 399 m,
and when the distance between two tunnels is no less than 400 m, white dashed
line can be set between the tunnels to allow lane changes.
ZHAO Qian, QI Yibin, WANG Shaofei, WANG Shanshan, DUAN Xiaobin
. Lane Changing Schemes for
Long (Extralong) Tunnels and Tunnel Groups
on Mountain Expressway[J]. Tunnel Construction, 2024
, 44(S1)
: 317
-326
.
DOI: 10.3973/j.issn.2096-4498.2024.S1.035
