Highway Research Record

I.HIGHWAY PLANNING, MANAGEMENT, PERFORMANCE EVALUATION AND INSTRUMENTATION
2. PAVEMENT EVALUATION
NEW PROJECTS
Condition Assessment and Roughness Measurements of Delhi - Agra (NH-2) and Delhi - Jaipur (NH-8) Highways

Duration: June2004
(i) Central Road Research Institute, New Delhi (R I)
(ii) National Highways Authority of India (S)

Scope and Objectives
The scope of work included the measurement of roughness and visual condition assessment of pavement surface including the visual assessment of other features such as condition of drainage, shoulder and median on Delhi-Agra section on NH-2 and Delhi-Jaipur section on NH-8
The information/ data collected would be applied for assessment of maintenance inputs and the quality of maintenance works done.

Methodology

Two experienced raters (qualified and experienced Highway Engineers) made visual assessment of the pavement surface condition for each of the two highway sections, km-wise, on a 5-point scale (based on the riding comfort and user’s perception), by moving in a vehicle at a slow speed of 15-20 km/ hr. Both the raters noted down their individual condition assessment with regard to percentage surface defects covering individual surface defects like cracking, potholes, patching, depression/ settlement, bleeding, shoving or any other defect as well as the total surface distress/ defects in a km. Similarly, visual condition assessment surveys for other key features like drainage, shoulders, median and plantation were also made independently by the two raters.
The roughness measurements were carried out, on one wheel path, by using Fifth Wheel Bump Integrators which were duly calibrated by Dipstick, before start of work.

Conclusions
About 64 % length on Agra bound carriageway is having total surface distress/ defects below 5 % while about 67 % length on Delhi bound carriageway is having total surface distress/ defects below 5 %. Similarly, about 55 % length on Jaipur bound carriageway has total surface distress/ defects of the order of up to 5 % while the corresponding length is about 47 % on Delhi bound carriageway. About 78 % length on Agra bound carriageway is having roughness below 2500 mm/km whereas the corresponding length on Delhi bound carriageway is about 85 %. Similarly, about 70 % length on Jaipur bound carriageway has roughness below 2500 mm/km whereas the corresponding length on Delhi bound carriageway is about 78 %.

Significance/ Utilisation potential
The data base developed can be used for analyzing the maintenance strategies towards improving the road condition. This data base will serve a long way in development of Pavement Maintenance Management System.

Reports/ Publications
A technical report submitted to NHAI