This video will show a basic approach on how to make a procedural bridge.
It will introduce you to the basics of Houdini and the procedural approaches it has.

Starting from a line (or any curve you have) it will create a bridge.
First thing to do is control the bridge shape by a ramp. This makes it easier for controlling and art directing the shape.
Next steps involve procedural modelling. Like using a sweep node so give the input curve basic geometry. From that geometry it can be extruded and then beveled to create planks or stone borders.
Also let's give the bridge some color by the Labs gradient node, it will look better and it is also nicer to work with.

A small finishing touch here is adding a basic support system. There are multiple approaches of doing this and here I took a simple approach so everyone can understand it.

Let me if this modelling is interested and I'm looking forward to make a couple more!

Timestamps
00:00 Intro
00:06 Curve and ramp control
01:04 Base sweeps
01:38 Create Border
03:29…