River Thames Thames Estuary), the river is subject to tidal activity from the North Sea. Before the lock was installed, the river was tidal as far as Staines, about upstream. London, capital of Roman Britain, was established on two hills, now known as Cornhill and Ludgate Hill. These provided a firm base for a trading centre at the lowest possible point on the Thames. A river crossing was built at the site of London Bridge. London Bridge is now used as the basis for published tide tables giving the times of high tide. High tide reaches Putney about 30 minutes later than
Lower Thames Crossing Ockendon; the junction with the A13 would be redesigned and the junctions with the A128 and A226 would be removed. Furthermore, the A2 would be widened from its junction with the new crossing approach road to Junction 1 of the M2. Lower Thames Crossing The Lower Thames Crossing, or Third Thames Crossing, is a proposed new road crossing of the River Thames estuary linking the county of Kent with the county of Essex through Thurrock. The route was confirmed on 12 April 2017 by Transport Secretary Chris Grayling. It is designed to relieve the pressure on the existing A282 Dartford