Linear Drains
Linear drains were designed for the interception of wide spread, low flow situations. Applications include intercepting sheet flow from the roadway when collection at a concentration point is not practical, or providing a generalized inlet for stagnate flow on pavements without slope. Linear drains have the advantage that no depression is necessary for hydraulic efficiency.
Linear drains may be useful in problematic areas where curb and grate inlets are ineffective, such as along a median barrier, and at super elevation transitions. Linear drains can also be installed transversely across the roadway.
However, linear drains have several drawbacks:
- Linear drains have a high propensity to collect debris in sag configurations. Regular maintenance is required to clear debris from over the drain inlet.
- Installation can be difficult. Because the inlet is installed flush with the surface of the pavement, placement is critical.