He could only steer them towards the Underground Railroad, the secretive systems of bunkers and tunnels running beneath major cities that were developed by the PMF during the ten-year war.
He started the car again and drove through a series of tunnels and intersections, a virtual underground street grid, before arriving at a large garage filled with gleaming cars.
It's a series of bunkers connected by tunnels, set up by the PMF to protect the people during the East-West War.
The Paris line is built with the standard gauge of 4 ft 82 in., but its tunnels are designedly made of such a small crosssection that ordinary main line stock cannot pass through them.
They walked for two hours without running into any tunnels branching off from the main one.