Tunnels underneath the River Thames constructed up to 1999 for the Millennium Dome; and a tunnel to the site of the old Ferranti power station on the east side of the mouth of Deptford Creek. There is also a tunnel between Cottons centre and the old Billingsgate Fish Market near to London Bridge. Citibank used it for cabling at one point; it was large enough for a person to walk through. The Silvertown Tunnel is a new Thames river crossing proposed to supplement the existing Blackwall Tunnel, which will join the Greenwich Peninsula with West Silvertown. There is also a further tunnel about two miles
Controlled-access highway The Queen Elizabeth II Bridge / Dartford tunnel at London Orbital, is an example of this. London Oribital or the M25 is a motorway surrounding London, but at the last River Thames crossing before its mouth, motorway rules don't apply. (At this crossing the London Orbital is labeled A282 instead.) There are many differences between countries in their geography, economy, traffic growth, highway system size, degree of urbanization and motorization, etc.; all of which need to be taken into consideration when comparisons are made. According to some EU papers, safety progress on motorways is the result of several changes, including