I completely agree in the importance of tagging start_date! This one isn't actually a road I added however, see https://www.openhistoricalmap.org/way/198580121/history#map=13/51.4622/0.1072&layers=O&date=1924-12-08&daterange=1824-01-01,2024-12-31. I probably just connected another road to it, and/or made some minor adjustments to the line of the road.

I'm not quite sure what the start_date should be, I think it's following roughly the same route as the Roman 'Watling Street' but some more research would be helpful.

Also the name is doubtful, I think only part is called Old Kent Road.

There are several roads and other features like this which have been added without start dates and other issues. Any help you can give in fixing them would be great!