Factorio Forums

Hello guys. Since there are no bridges / tunnels, how can one build a dual lane (two lines in the same direction) where track-track crossing doesn't act as a bottleneck?

In OpenTTD one can use the rule of thumb: "split before merge" where the lane switch block is at least a train length. So one simply splits off to one direction and bridges/tunnels over to the desired side without disturbing the other lane. What would the Factorio approach look like? Is it more like a full speed line with accelerating blocks before entering and decelerating blocks after exiting, controlled by combinators?

Sounds like a nice challenge, use combinators with timing and a rapid reset to calculate the speed of a train and manipulate a signal to force a train into another lane if it's going fast enough.

As for crossing tracks without disturbing other traffic, there isn't a nice way, but if your trains are moving fast anyway, they won't block traffic for very long anyway

Fahrradkette wrote:one simply splits off to one direction and bridges/tunnels over to the desired side without disturbing the other lane.

Dual track intersections are impossible to do efficiently without bridges/tunnels.