The HATS region has nearly 5,000 miles of roadway with nearly 1,700 miles on the Federal Aid System:

federal aid mileage table

Reported in inches per mile, International Roughness Index (IRI) ratings provide a metric which illustrats the smoothness of the ride on a surveyed stretch of road. While IRI provides a rating for the road, the evaluation of that rating varies depending on characteristics of the road itself. IRI evaluation and overall rating of a road depends on which business plan network it falls in. PennDOT’s breakdown of IRI evaluation is shown in the following graphic:

IRI ranges table

Broadly, the median IRI ratings for all business plan networks in the Federal Aid System fall within “Good” or “Excellent” ranges. Non-NHS roadways with less than 2000 ADT have seen overall improvement. In 2014, the median IRI rating in this business plan network fell into the “Fair” range. At the time of the writing of this plan, it has improved to the “Good” range.

Business Plan Network table

Looking at the overall comparison of pavement quality in the HATS region, there has been improvement. Fair and poor segment miles have seen a slight decrease while Excellent and Good segment miles have seen an increase. Between 2014 and 2018, there has been an improvement of approximately 35 “Excellent” segment miles on Federal Aid roadways in the region while “Poor” segment miles have seen a decrease of the same amount, most likely due to recent resurfacing projects. 

Roadway Condition 2014 and 2018
roadway condition by business plan network

In terms of bridges, the region continues to be in good standing in regards to District targets in all areas except for poor condition bridge deck area on the NHS Non-Interstate network (BPN2) and on the local network. HATS will move forward with a focus on bridges in these particular networks and continue to find resources to address bridge needs.

As part of PennDOT’s 2017 Extreme Weather Vulnerability Study, a risk score is assigned to state-owned roadways and bridges at risk from floodwaters. This score combines variables of precipitation, floodplain location, reported past closures, bridge scour, deficient pipes, road classification, and traffic volumes. The highest possible score is 100 being the most vulnerable. Road Condition Reporting System (RCRS) events from 2006-2015 and stakeholder comments were combined to identify the vulnerable areas.

See the PennDOT Extreme Weather Vulnerability Study for more information, data, and statewide maps.

In 2017, Dauphin County received a $2 million grant to implement the $5 registration fee to address county bridges. Cumberland County also recently received state funding to complete one of their local bridges through PennDOT’s LaSeR initiative.

Key Recommendations:

Asset Management interactive map application

Asset Management interactive map application

  • Continue coordination with PennDOT to select projects for future TIP updates to address eligible SD or FO bridges or poor IRI roadway miles;

  • Continue to assist municipalities in finding financial means to address local bridge projects;

  • When released, coordinate with the necessary agencies to work toward applicable performance targets for pavement and bridges.