Street Selection for Resurfacing
The City of Columbus, Department of Public Service maintains
approximately 6,400 lane-miles of City roadways including portions of State
Routes 315, 161, 33, and 104.
The Department of Public Service uses a Pavement Management
System as a tool to plan maintenance activities on every City roadway. This
tool is used every year to ensure the maximum return on investment.
Pavement preservation is a proactive approach that consists
of three components: preventive maintenance; minor rehabilitation
(non-structural); and routine maintenance activities.
- Preventive maintenance is a planned
strategy of treatments applied to pavement in good condition that still has
significant life (crack sealing, slurry sealing).
- Minor rehabilitation consists of
non-structural restoration enhancements performed to existing pavement by
eliminating the portion of the pavement showing aging, and signs of minor
top-down surface distresses. Resurfacing (milling and asphalt overlay) of the
top 1 to 3 inches with some base repairs is an example of minor rehabilitation.
- Routine Maintenance includes activities
such as pothole patching, minor partial or full-depth pavement repairs, and
isolated milling and asphalt overlays.
The City’s pavement management system includes an inventory
of every roadway segment (block-to-block) that includes: length, width, surface
type, pavement condition, traffic volumes, and roadway functional
classification. The pavement condition is assessed every 3 years for arterial
streets and 5 years for residential streets. The pavement condition surveys are
completed using a moving vehicle at speeds between 8 and 60 mph with lasers and
automated sensors mounted to the vehicle.
Using the information collected, the pavement management software
generates a pavement condition number (PCN) on a scale of 10 to 100. A PCN of
100 represents a pavement with no distresses (new pavement), whereas, a PCN of
10 represents a pavement with “very-severe” distresses. PCN values can then be
associated with the pavement rating scale shown below.
Pavement Ratings and Pavement
|Pavement Rating||Pavement Condition Number (PCN)|
When Selecting Streets for the Resurfacing Program
There are many factors considered when recommending and
scheduling a roadway for the resurfacing program:
condition: The pavement condition number (PCN) is only one of the factors
when programming streets to be resurfaced.
The PCN is a major component, but it alone does not set the
How much daily traffic the roadway carries factors into the selection of a
roadway. Example: An arterial roadway
with an average daily traffic (ADT) of 35,000 may take priority over an
arterial in similar condition with an ADT of 12,000. Likewise, a residential collector with an ADT
of 3,500 may take priority over a residential street with an ADT of 250.
Maintenance Input: There are times when a roadway’s condition deteriorates
faster than anticipated creating a situation where the PCN value may no longer
accurately describe its condition. If the amount of routine maintenance or
pothole patching on a roadway becomes an issue, the Street Maintenance
Investigator assigned to that area will notify the Pavement Management Group.
Input/311 Call Center: When a constituent submits a concern or request
using the City’s 311 Call Center to have a pothole filled or to have their
street resurfacing, a service request is created. This service request is received and
investigated by the Street Maintenance Investigator assigned to that area of
the City. If the service request is for
a pothole, a work order is written by the Investigator to have the pothole
filled by Street Maintenance. If the
request is to have the street resurfaced, the Investigator will review the
condition of the street and verify if it has already been identified for future
resurfacing. If the roadway warrants
resurfacing and has not already been identified for resurfacing, the
Investigator will notify the Pavement Management Group.
the resurfacing effort around the City: The Pavement Management Group
attempts to make sure that the resurfacing efforts are being fairly distributed
around the City while at the same time being cognizant of the entire network pavement
projects: Public Service communicates with other City Departments, governmental agencies, and private utilities to perform project conflict
detection. These communications allow the Department - in most cases - the ability to coordinate our efforts around the efforts of other entities.