Table of Contents
Since version 99 there is a new possibility: underground mode. This opens a lot of new playing possibilities. Underground mode makes only sense to the road and rail traffic vehicles. This mode makes mostly sense in urban built area. Now it is possible, to make a mixed rail network in urban area, which is partly underground, and partly below.
To enter the world beneath, a tunnel must be used. It depends, if there will be road or rail underground path, appropriate tunnel type must be used. A full tunnel is build, with an entry and exit.
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Construction differs a litte bit from the surface construction, but is mostly very similar. Instead of using the road/rail tool, the tunnel tool is used to extend the network in underground mode. To begin construction in the underground, first a switch to underground mode must be done. After that, it is needed to use the tunnel tool, just like the rail/road tool on the surface. The link between the tunnel entry and exit must be broken, using the destroy/remove tool. After that, the successive tunnel part can be destroyed from surface, and underground construction can commence. The pictures below illustrates the usual sequence.
switch to underground mode and delete the connection part
the destroying is accomplished using the remove/destroy tool
begin building an extension by using the tunnel tool, not the normal road/rail tool !
tunnel tool looks somehow like this
extend the network in the wanted direction
destroy the remaining unnecessary part
destroy the dummy road
destroy all remaining of the dummy road
underground mode connection to surface is accomplished
