Samenvatting
Edge drains are a vital component of pavement drainage systems. In Indiana, performance problems exist with the types of drains used. A study was initiated to inspect and evaluate existing and retrofitted subdrainage collector systems through external visual inspection in combination with a probe for internal inspection. Distresses and deficiencies observed in construction are listed and have been compiled on video. A methodology for inspection is presented that can be used by highway agencies in monitoring the condition, need for maintenance, and performance of collector systems. (A)