Oulton Broad North LC is very busy. It only has 1tph in each direction, but traffic on the road can be very heavy, since it's used as an alternative to the A12 through Lowestoft. What makes it worse is that just under a mile further on is a lifting bridge, and when these both operate around the same time it can really get conjested, although they try and open the bridge between trains, so that traffic has had chance to clear. It was especially bad last time I was over that way since there were roadworks in Lowestoft, so many people were going through Oulton Broad. Due to it being in a built up area, bridging would not be easy. The most likely solution is eventually to build a bypass around both Lowestoft and Oulton Broad, bridging the railway and the river, but this would be expensive (both the need for a fairly long bridge, probably with a lifting span, or else high enough for all river traffic, and also the need to pass through marshy areas either side), and have a lot of environmental issues (being in the Broads National Park).