Annual Roadway Improvements Program
A number of roadways are scheduled for improvements in the upcoming season:
- 2018 Roadway Surface Treatment- Rubber Chip Seal
- 2018 Roadway Resurfacing- Mill and Overlay
- Fenwick Street Roadway Resurfacing
- Salem End Road Roadway Surface Treatment
The Department prioritizes work to be accomplished on roadways with a pavement condition index (PCI) that is updated annually. This important document provides data that is necessary to be able to make informed decisions about the course of action that we will take on the roadways earmarked for treatment. Below are the 4 basic types of treatments that are most often utilized.
Mill and Fill: The Department utilizes in-house equipment and personnel in conjunction with specialized contracted equipment to grind sections of roadway with severe defects and then pave the localized areas. This maintenance method is utilized for roadways experiencing chronic potholes or defects that are not scheduled for more extensive rehabilitation or reconstruction.
Crack Sealing: This maintenance effectively and efficiently seals roads that have started to show signs of surface cracking to extend the service life of the road and to minimize the potential for further defects.
Roadway Surface Treatment
Bonded Wearing Course is an asphalt product that the Department utilizes to extend a road’s service life while awaiting future utility work. This product seals and protects the surface of the roadway and provides superior bonding of the ultra-thin mix to the pavement. This treatment requires the adjustment of structures and the restoration of traffic markings.
Rubber Chip Seal is a surface treatment takes place on neighborhood roads with lower speeds and reduced traffic volume. This process is an efficient way to provide neighborhoods with a more rideable surface. Surface defects are repaired before an area receives a thin leveler course. This Hot Mix Asphalt (HMA) treatment improves the profile of the road and improves surface drainage. The HMA also provides some structural stability for the road; however, since it is a thin layer, it will not withstand traffic volume overtime or harsh winters. After structures are adjusted, a rubber chip seal treatment is applied. Any loose stone is swept on a regular schedule. (See a quick video on our rubber chip seal treatment application below).
Mill and Overlay: the Department utilizes a roadway rehabilitation strategy for extending the service life of a roadway. Resurfacing often includes stormwater drainage improvements, milling the top layer of asphalt, an HMA leveler course, intersection improvements, structure and curbing adjustments, sidewalk improvements including upgrades to meet American Disability Act (ADA) standards, signage upgrades and restoration of traffic markings.
Stress Absorbing Membrane Inter-Layer (SAMI): Some roadway rehabilitation includes a highly durable SAMI treatment. It is similar to a Rubber Chip Seal treatment but it is used between the layers of the hot mix asphalt for a different purpose than surface treatment. It is utilized to extend the service life of various roadway treatments.
When roadway defects are extensive, reconstruction including removal of the asphalt and some grading of the base material is required. Then a layer of binder pavement is applied and the process similar to Mill and Overlay is followed including stormwater drainage improvements, intersection improvements, structure and curbing adjustments, sidewalk improvements including upgrades to meet ADA standards, a final HMA pavement is applied, signage upgrades and finally restoration of traffic markings.