Abstract: Disclosed is a traffic system and method for motor vehicles (F), comprising, on the side of a traffic lane (12b, 12c), a dedicated track (21) in the form of a “U”-shaped gutter receiving, in a highly automated driving mode, one of the side wheel assemblies (16) of a vehicle, and comprising: • a running surface (22) substantially parallel to the surface of the roadway of the traffic lane (12b, 12c), • two side surfaces (23, 31) located on either side and above the running surface (22), one external (23) and the other internal (31) with respect to the footprint of the vehicle (F), the side surfaces (23, 31) being substantially perpendicular to the running surface (22), the internal side surface (31) maintaining the current ground clearance of the motor vehicles, wherein the side surfaces (23, 31) of the track are substantially continuous longitudinally and in that the system comprises a means for crossing the internal side surface (31) by lateral movement of the side wheels assembly (16) at sustained speed.

Abstract: Foldable pipe-in-pipe composite tubular structure having between pipes after rounding and hardening a filling material associating the layers to enhance the structure mechanical performance mostly in collapse resistance.

Abstract: Composite tubular casing with hardened material between thin pipe-in-pipe increasing the bending capability of the casing wall delivers high collapse resistance. Solid Expandable technology allows substantial wellbore slimming at the expense of collapse resistance. By combining both technologies, cost effective high collapse resistance wellbore construction can be achieved.

Abstract: Pipe-in-pipe composite tubular structure having between layers a hardenable filling material associating the layers to enhance the structure mechanical performance mostly in collapse. Prior to harden the filling material, the composite tubular structure can be longitudinally deployable between a folded configuration and a deployed configuration, and has a radial dimension increasing between the folded configuration and the deployed configuration. Such structure is well fitted to be used in oil-well downhole structure and casings or underwater pipeline/flowline.