The One Map application is a web-based GIS mapping application for highway and bridge projects on the Commonwealth's Twelve Year Transportation Program and Regional Transportation Improvement Plans (TIPs)This application allows users to map and obtain information for highway and bridge projects, and to search these projects by criteria such as:LocationPlanning partnerLegislative districtPennDOT engineering districtHighway Occupancy Permits (HOPs)Projects can also be mapped individually by MPMS Project ID number or by Bridge Key.All users, not just new users, are encouraged to watch the tutorial video for PennDOT One Map. There is new functionality available for users, as well as different workflows. This video will be most helpful for users to navigate PennDOT One Map.

Local Roads for Pennsylvania. This data set contains only roads eligible for the Municipal Liquid Fuels Program funds. Visit PennDOT’s Liquid Fuels webpage for additional information. Click here for the Local Roads Data Dictionary which provides details about the format, structure and definitions of this dataset.

Both the New Jersey Department of Transportation (NJDOT) and the Pennsylvania Department of Transportation (PennDOT) track pavement conditions as required by federal regulations for state-maintained and National Highway System (NHS) roadways. NJDOT and PennDOT maintain data on the condition of all federal- and state-owned roadways.

States and the Federal Highway Administration use a number of different methodologies for classifying pavement conditions. A common measure of road condition is the International Roughness Index (IRI). The IRI determines pavement roughness conditions based on total inches of surface variation per mile. IRI is one of the pavement condition measurements that PennDOT uses. New Jersey integrates two condition measures, IRI and its Surface Distress Index (SDI), into condition ratings. SDI was developed by NJDOT based on the size of cracks, holes, and ruts in a roadway. Therefore, when segment miles (see below) or percentage of segment miles are added up for the region, note that these are aggregations combining two different classification methods.

Segment miles are used in the pavement conditions graphs, as both states provide data to calculate this metric. Segment miles measure the roadway length. Length is doubled for divided facilities. Unlike lane miles which fully account for pavement width, segment miles underrepresent the pavement conditions of wider roads and highways, with more lanes. About 4,200 segment miles of road are tracked in Pennsylvania and about 1,600 are tracked in New Jersey. These roads are primarily those owned and maintained by each state DOT, though they include some locally maintained roads that are a part of the National Highway System (NHS). The NHS is a federally designated network of roadways important to the nation’s economy, defense, and mobility. Section 1104 of the Moving Ahead for Progress in the 21st Century Act (MAP-21) expanded the NH) by including all principal arterials in existence on October 1, 2012. adding 60,000 miles to the NHS. This is the reason for the increase in NHS segment miles in 2013 in the charts below, along with the decrease in non-NHS segment miles.

Stormwater management involves the control of water that runs off the surface of the land from rain or melting ice or snow. The volume, or amount of runoff and its rate of runoff, substantially increase as land development occurs. Construction of impervious surfaces, such as roofs and parking lots, and the installation of storm sewer pipes which efficiently collect and discharge runoff, prevent the infiltration of rainfall into the soil. Management of stormwater is necessary to compensate for the possible impacts of development such as frequent flooding, erosion and sedimentation problems, concentration of flow on adjacent properties, damages to roads, bridges and other infrastructure as well as non-point source pollution washed off from impervious surfaces. The Pennsylvania legislature enacted the Storm Water Management Act (No.167) in 1978 to authorize a program of comprehensive watershed stormwater management which retains local implementation and enforcement of stormwater ordinances similar to local responsibility of administration of subdivision and land development regulations. Under the Act, the Department of Environmental Protection (DEP) provides grant money to counties to develop stormwater management plans for designated watersheds. This planning effort results in the incorporation of sound engineering standards and criteria into local codes and ordinances to manage runoff from new development in a coordinated, watershed-wide approach. Counties develop stormwater plans for each of their watersheds within their boundaries. DEP develops grant agreements with counties to pay for 75 percent of the cost to prepare the plans. Upon completion of a plan by a county and approval by DEP, municipalities located in the watershed adopt ordinances consistent with the plan. Developers are then required to follow the local drainage regulations that incorporate the standards of the watershed plan when preparing their land development plan. Although not all watersheds have been studied, developers in non-studied areas are still required to follow any local drainage regulations adopted under the Municipalities Planning Code. County boundaries within Pennsylvania as delineated for the PennDOT Type 10 general highway map.