Each year the condition of roads throughout Ada County is closely assessed, and a priority system is used to determine which roads have the greatest need for re-surfacing-related maintenance. The 2009 overlay road projects will include the resurfacing of nine road and intersection locations in Ada County.
Roads will be resurfaced using a hot asphalt concrete mix. In some cases they will first be rotomilled - a process that removes 2 inches of the old surface and allows for improved smoothness and appropriate roadway height. Following the rotomill process, roads will receive a new layer of asphalt mix.
Overlay projects are an important component to roadway maintenance. Smooth roads have a longer life because they create a better driving surface, allowing traffic to have less impact on the roadway. The process also replaces weathered and worn materials, resealing the roadbed to prevent moisture from causing major structural damage.
The 2009 overlay projects will also include the upgrade or replacement of pedestrian ramps adjacent to the overlay project locations. Pedestrian ramps will be brought to current Americans with Disabilities Act (ADA) standards where needed.
The following locations will receive overlays: