I've had to admit defeat and change my route to work as one particular roundabout is just too busy now at rush hour (08.00hrs) with a dual-carriageway leading onto it and a motorway slip-road coming off it - both 70mph roads in the UK. In the Spring and Summer it was OK but there are so many more people back in work now (after lockdown and furlough) that it's just too busy. To be fair, the footbridge and underpass has always been there for this very reason. You're supposed to dismount for the footbridge but I can't ever recall seeing a pedestrian on it and it's an easy inner ring climb. Tested it yesterday and it adds about 90 seconds. Oddly enough, my return journey is unaffected as the early evening rush hour has passed and traffic lights work in my favour.