Improve public transit efficiency and never worry about train delays again! One incredibly practical engineering trick that you won’t believe isn’t already a standard feature.

Background:

Rail-based transportation has an inescapable problem: in a single-track situation, there is no way for a train to pull over and let another train pass.

The issue:

Thus, a single stopped train can block an entire track indefinitely. And a slow train can’t be overtaken by an express train.

This can be solved by adding multiple rails, but that is prohibitively expensive except in very small sections of track. Additionally, it increases recurring maintenance costs.

Proposal:

There is one incredibly simple solution to this problem: just put an additional set of tracks on top of every train car (Figure 1).

1-passing

Fig. 1: Each train car has a set of standard rails mounted on top, shown here in red. The very front-most and last-most cars must have a ramp as well.

 

Now, a slowed or stopped train can be passed by simply driving the passing train over the stopped train (Figure 2).

2-passing-train

Fig. 2: Here, the passing train (purple) is able to pass the stopped train by going onto the second set of tracks (red). The passing train would presumably also have a second rail on top, but it is omitted here for clarity, and definitely not because I forgot to draw it.

 

Conclusion:

As seen in the illustration above, this will definitely work on train cars weighing hundreds of thousands of pounds, so construction on this project can begin immediately without further testing.

PROS: Effectively turns every single track into a double track.

CONS: May cause complications if this method is employed while the being-passed train enters a tunnel during the passing process.