although a protection plan against flooding was made, either by the prefect or the mayor, in August 2006. Channels of communication and transport Roads Antony is primarily served by the D920 road (formerly National Route 20) which passes along the entire length of the commune tracing the route of the Roman road via Aurelianensis which crossed Gaul from south to north coming from Spain and going to Cologne. Crossing Antony from east to west is the A86 autoroute which, since 1996, follows the route of National Road RN186 which itself traced the route of the road opened by Louis XV. The A86 is heavily used by Parisians during peak hours in the morning and late afternoon. It is a way of avoiding Paris by a peripheral route. Though it replaced the function of the RN186, the latter was retained as an urban axis. Parts of the A86 are covered or are in a tunnel at Antony. Work began there more than thirty years ago and was completed by the end of the 2000s. Due to lack of funding, construction of the southern tunnel of the A86 has currently stopped at the RER bridge. The drilling of the section between the Sub-Prefecture building and the RER bridge is still under consideration by State services. These roads have very high traffic (20,000 to 40,000 vehicles per day) and cause nuisance to local residents. It is expected that eventually the RD920 will be converted into an urban boulevard. Antony is also served by the A10 autoroute with an exit to join the RN20 and to enter through the south of the city. Bicycle paths and pedestrian areas In November 1989 a bike path running through the city inside the Green Belt was built for a length of . Since 9 October 2005 it has been possible to cycle inside the Parc de Sceaux, an area dependent on Hauts-de-Seine department but partly in Antony. Given the density of traffic and as intended by PLU, a coherent easy circulation network consisting of areas limited to 30 km/h and cycling paths primarily to schools and colleges was created. A zone limited to 30 km/h is linked to a zone limited to 10 km/h: in this area priority is given to pedestrians as shown in the photo below. Expansion of areas limited to 30 km/h is underway in all areas of Antony with the aim of gradually