There is a new reduction of speed limit on this major road … the speed limit is now 50MPH …
Eastbound from https://www.waze.com/livemap?zoom=15&lat=51.31878&lon=0.97002 to https://www.waze.com/livemap?zoom=17&lat=51.36304&lon=1.21425
and westbound from https://www.waze.com/livemap?zoom=17&lat=51.36468&lon=1.20366
to https://www.waze.com/livemap?zoom=15&lat=51.32482&lon=0.98555
a detailed map from Kent CC here:
http://www.kent.gov.uk/__data/assets/pdf_file/0018/61812/Thanet-way-speed-restriction-map.pdf
These are permanent changes with permanent speed signs added