Statistical Analysis of Traffic Accidents in Shanghai River Crossing Tunnels and Safety Countermeasures

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td align="left">Road classification</td><td align="center">Number of accidents</td><td align="center">Total length of tunnel (km)</td><td align="center">Accident frequency (acc/km<sup>−1</sup>)</td><td align="center">Design speed (km/h)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td align="left">Express way</td><td align="center">2739</td><td align="center">11.023</td><td align="center">248.48</td><td align="center">80</td></tr><tr><td align="left">Arterial road</td><td align="center">1162</td><td align="center">5.561</td><td align="center">208.96</td><td align="center">40</td></tr><tr><td align="left">Secondary road</td><td align="center">1061</td><td align="center">17.232</td><td align="center">61.57</td><td align="center">40</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

City road classifications and traffic accidents.

Discrete Dynamics in Nature and Society

tab2

Table 2

Table 2: Statistical Analysis of Traffic Accidents in Shanghai River Crossing Tunnels and Safety Countermeasures 