KCTRP: To Evaluate the Effectiveness of Internal Drainage Layers Used in Pavement Structures 09-373

OBJECTIVES: The objectives of this project are to: 1) Conduct a literature review of current state of practice for subsurface drainage of pavement structures. 2) Identify current and past methodologies used by Kentucky for subsurface drainage, such as drainage blankets, daylighted granular vase and edge drains. 3) Identify types of projects/construction techniques that would require various drainage treatments such as rock roadbed and stabilized subgrade. 4) Work closely with the Kentucky Transportation Cabinet to identify the candidate projects with and without drainage systems to evaluate their performance. 5) Make appropriate recommendations for potentia] design changes based on the evaluation of the performance of pavements with drainage systems.