If you look it up on Google Streetview, it replaces a fairly basic concrete bridge with limited road clearance which had very clearly been hit multiple times.
Bridge strikes are expensive - the railway often has to be shut as a precaution - and with the increase in rail services, it doesn't seem unreasonable to have lowered the level of the road to create more headroom. Yes, that's time consuming and expensive to do but the alternative would have been to ban lorries and double decker buses.
Really, it's now more of an underpass than a bridge. I don't think I've ever seen a pretty underpass, and this doesn't even appear to be a particularly grim example. It's actually much better than what it replaces, both in terms of function as well as aesthetically.
https://maps.app.goo.gl/BgYYwfWmkzbnZHCW7
Bridge strikes are expensive - the railway often has to be shut as a precaution - and with the increase in rail services, it doesn't seem unreasonable to have lowered the level of the road to create more headroom. Yes, that's time consuming and expensive to do but the alternative would have been to ban lorries and double decker buses.
Really, it's now more of an underpass than a bridge. I don't think I've ever seen a pretty underpass, and this doesn't even appear to be a particularly grim example. It's actually much better than what it replaces, both in terms of function as well as aesthetically.