WAVERide
WAVERide is a term coined by Blue Lightning of the NAM Team to refer to items which blur the line between Puzzle Pieces and Override Networks, allowing for the modularity and flexibility of an override with a more complicated setup that is near-impossible or completely impossible through standard dragging and network override technqiues.
Technically, the first WAVERide pieces were the Diagonal Street Helper Pieces, introduced by memo in NAM Version 20 from December 2006. These pieces got around the limitations of the existing "zig-zag" draggable override, allowing diagonal streets over shorter stretches, slope tolerance, and most importantly, intersection capability with other networks.
The technology found its way into the RealHighway (RHW) mod in 2010, when Blue Lightning created the FLEXFly (Flexible Flyover) system as part of the Version 4.0 release, which allowed for single-lane flyover ramps, under which RealHighway networks could pass in various configurations. The popularity of FLEXFly has often led to any sort of WAVERide being called a "Flex" setup. The Version 4.2 release of RealHighway will include a new WAVERide setup developed by Tarkus, FlexSPUI, which allows the construction of a flexible, modular Single-Point Urban Interchange (SPUI) in various configurations.