Gravel car parks provide a solid, stabilised and free-draining surface suitable for cars, vans, trucks, coaches and lorries. Gravel is often specified for use as the permeable paving surface for car parks. The open structure of gravel provides a free draining surface which allows rainwater to permeate through to the sub-base.
With the correct construction and drainage systems, a porous gravel car park can be part of a SuDS system through natural infiltration of the rainwater into the sub-base, or through an attenuation system.
The use of a porous plastic paving grid is commonly used to create a retained gravel surface. The cellular structure of the plastic grids retain the gravel by creating an interlock, limiting the amount of gravel that can be displaced by vehicle tyres.