LEGISLATOR Fung Chi-wood last night called on government authorities and tunnel management companies to review the two-way traffic policy in operation at the tunnel overnight. ''It is very dangerous for drivers to drive their vehicles with others coming from the opposite direction inside the tunnel. The lanes are narrower than other roads,'' he said. He said that when cones were not used to separate the two lanes it was easy for drivers to cross lanes or collide with other vehicles. ''When they close one of the tunnel sections, the cones should be in place to separate the two lanes and the sign showing the speed limit at 50 km/h should be put up in suitable areas to warn drivers to reduce their speed,'' he said. Mr Fung also suspected that the closure of tunnels was carried out as a money-saving method rather than for conducting routine maintenance.