and

Eddie Y. Chou

Department of Civil Engineering

University of Toledo

Toledo, OH 43606

A pavement management system provides objective and systematic decision-making assistance for selection of the optimum maintenance and rehabilitation strategies. The City of Toledo is developing a pavement management system for its street network.

Dynamic Segmentation technique is employed by dynamically dividing the entire street network of the City into sections according to various roadway characteristics. These roadway characteristics include functional classification, ride quality (as measured by the International Roughness Index), visual distress rating and traffic volume.

ArcView, a Geographical Information System software developed by ESRI Inc., was used for mapping of the roadway characteristics. To facilitate the process of Dynamic Segmentation using ArcView, an extension named "Road Survey" was obtained and used to convert the line type from Polyline to PolylineM, so that attributes can be associate with each line segments.

Dynamic Segmentation associates multiple sets of attributes with any portion of a linear feature. In ArcView, these attributes are stored, displayed and queried. Dynamic Segmentation models linear features using routes and events. A route is a linear feature, such as the city street in this project. A route contains measures, which describe the distance between different points on the route, i.e., the beginning and ending points of each section. These measures are used to locate data representing attributes of each section. Data along the route are known as events, such as the road characteristics in this project.

Each route is linked with a measurement system, a linear representation consisting of a starting value and an end value and some other values along the route. Attributes associated with a route, such as pavement ride quality, can be stored in an event database.

An overlay process is then used to join various characteristics to produce a map showing sections with unique characteristics. Such map can help a planner decide which pavement sections need to be resurfaced first. Additional pavement deterioration factors can be considered in the future, for example, thickness and elastic modulus of each pavement layer, and date and method of construction, etc.