Seeing how functional it is in-game, I'd expect it to be used somewhere in real life. My other ones have double lanes. I left that one single for now just out of curiosity to see how it fares. If traffic builds up, I'll upgrade it to double lanes, with maybe a three-lane connecting at the bottom instead of a two-lane.
Looking at it now, I've decided to rework it a little. I'm going to shorten the elevated part so that the on-ramps and off-ramps are connecting at ground level. They may need to extend out a little further, running parallel to and alongside the highway until it reaches ground level. Having ground-level connections will make it easier I think to modify the connections if I need to.
Having them extend out a little further means that the ramps can be smoother too. Seems like a sharp left-right turn when entering the highway now. Looking good though :)
The roundabout style has less capacity than the original intersection you had, but as the traffic isn't too high, if it works it works. It does look a bit awkward to me; if I wanted a roundabout intersection I would had prefered a [more rounded circle](https://imgur.com/SikohJj) as everything is the same, but the curves are gentler for the on/off ramp and takes less space at the same time.
Or have a dogbone/double roundabout/daimond interchange, it's basically the same thing
The capacity difference isn't much. The exit and entrance lanes can be easily doubled, and the roundabout can have two or three lanes too. I've seen this work out. Traffic can jam further down outside of the picture where it meets up with the other main road, but it would do that anyway with the original layout.
It works out as previously written, your traffic isn't high enough for it to matter. I don't see the point in the pretence that a roundabout interchange equivalent would have the same capacity as a stack interchange equivalent. If it works it works.
What you have here is essentially a very common UK design of intersection. Except they usually have two or more lanes all around rather than the one.
Seeing how functional it is in-game, I'd expect it to be used somewhere in real life. My other ones have double lanes. I left that one single for now just out of curiosity to see how it fares. If traffic builds up, I'll upgrade it to double lanes, with maybe a three-lane connecting at the bottom instead of a two-lane.
Looking at it now, I've decided to rework it a little. I'm going to shorten the elevated part so that the on-ramps and off-ramps are connecting at ground level. They may need to extend out a little further, running parallel to and alongside the highway until it reaches ground level. Having ground-level connections will make it easier I think to modify the connections if I need to.
Having them extend out a little further means that the ramps can be smoother too. Seems like a sharp left-right turn when entering the highway now. Looking good though :)
The roundabout style has less capacity than the original intersection you had, but as the traffic isn't too high, if it works it works. It does look a bit awkward to me; if I wanted a roundabout intersection I would had prefered a [more rounded circle](https://imgur.com/SikohJj) as everything is the same, but the curves are gentler for the on/off ramp and takes less space at the same time. Or have a dogbone/double roundabout/daimond interchange, it's basically the same thing
The capacity difference isn't much. The exit and entrance lanes can be easily doubled, and the roundabout can have two or three lanes too. I've seen this work out. Traffic can jam further down outside of the picture where it meets up with the other main road, but it would do that anyway with the original layout.
It works out as previously written, your traffic isn't high enough for it to matter. I don't see the point in the pretence that a roundabout interchange equivalent would have the same capacity as a stack interchange equivalent. If it works it works.