MDOT SHA Pavement Condition (NHS)

Esri ArcGIS Online (AGOL) Hosted Feature Layer which provides access to the MDOT SHA Pavement Condition NHS data product. MDOT SHA Pavement Condition (NHS) data consists of linear geometric features which represent roadway pavement conditions along the National Highway System (NHS) throughout the State of Maryland. This data product includes the national transportation performance measure infrastructure conditions, specifically the Good, Fair, & Poor condition ratings. These condition ratings, depending on surface type, are based on roughness, cracking, rutting & faulting. MDOT SHA Pavement Condition NHS data is owned & maintained by the MDOT SHA Office of Materials Technology (OMT). This data product is consistently updated on an annual basis for the prior year. This data product is for the year 2024. Though this data product as a whole is owned & maintained by MDOT SHA, the pavement conditions along roadways maintained by other Federal, State, County, and local government agencies are included within this data product. Roadway maintenance responsibility information can be further understood through the attribute values related to each linear segment. MDOT SHA Pavement Condition (NHS) data includes performance measures for pavements that are based on three condition ratings of Good, Fair, & Poor calculated for each pavement section, as described in Detailed in “National Performance Management Measures for Assessing Pavement Condition,” 23 CFR 490 Subpart C (Code of Federal Regulations). The included Condition Ratings are determined or calculated as follows: International Roughness Index (IRI) Condition Rating shall be determined / calculated for all pavement types using the following criteria. If an IRI value of a pavement section is: - - Less than 95, the IRI rating for the pavement section is Good; - Between 95 and 170, the IRI rating for the pavement section is Fair; and - Greater than 170, the IRI rating for the pavement section is Poor. Cracking Condition Rating shall be determined/calculated using the following criteria: (i) For asphalt pavement sections - - If the Cracking_Percent value of a section is less than 5 percent, the cracking rating for the pavement section is Good; - If the Cracking_Percent value of a section is equal to or greater than 5 percent and less than or equal to 20 percent the cracking rating for the pavement section is Fair; and - If the Cracking_Percent value of a section is greater than 20 percent the cracking rating for the pavement section is Poor. (ii) For jointed concrete pavement sections - - If the Cracking_Percent value of a section is less than 5 percent, the cracking rating for the pavement section is Good; - If the Cracking_Percent value of a section is equal to or greater than 5 percent and less than or equal to 15 percent the cracking rating for the pavement section is Fair; and - If the Cracking_Percent value of a section is greater than 15 percent the cracking rating for the pavement section is Poor. (iii) For CRCP sections: - If the Cracking_Percent value of a section is less than 5 percent, the cracking rating for the pavement section is Good; - If the Cracking_Percent value of a section is equal to or greater than 5 percent and less than or equal to 10 percent, the cracking rating for the pavement section is Fair; and - If the Cracking_Percent value of a section is greater than 10 percent, the cracking rating for the pavement section is Poor. Rutting or Faulting Condition Rating shall be determined / calculated using the following criteria. (i) For asphalt pavement: - If the rutting value of a section is less than 0.20 inches, the rutting rating for the pavement section is Good; - If the rutting value of a section is equal to or greater than 0.20 inches and less than or equal to 0.40 inches, the rutting rating for the pavement section is Fair; and - If the rutting value of a section in is greater than 0.40 inches, the rutting rating for the pavement section is Poor. (ii) For jointed concrete pavement: - If the faulting value of a section is less than 0.10 inches, the faulting rating for the pavement section is Good; - If the faulting value of a section is equal to or greater than 0.10 inches and less than or equal to 0.15 inches, the faulting rating for the pavement section is Fair; and If the faulting value of a section is greater than 0.15 inches, the faulting rating for the pavement section is Poor. - The overall pavement condition to calculate good/poor metrics combines consideration of IRI, cracking and rutting/faulting, depending on surface type. Overall Pavement Condition Rating is determined or calculated as follows: Good - For asphalt and jointed concrete pavements if all three metrics (IRI, cracking, and rutting/faulting) are good. - For continuous concrete pavements if both IRI and cracking are good. Poor - For asphalt and jointed concrete pavements if at least two metrics (IRI, cracking, and rutting/faulting) are poor. - For continuous concrete pavements if both IRI and cracking are poor. Fair - For all other combinations For additional information, contact the MDOT SHA OIT Enterprise Information Services: Email: [e-mail] ArcGIS Online (AGOL) 托管要素图层（Hosted Feature Layer）可用于访问马里兰州交通厅州公路管理局（MDOT SHA）的国家公路系统（National Highway System, NHS）路面状况数据产品。MDOT SHA 路面状况（NHS）数据由线性几何要素构成，用于表征马里兰州境内国家公路系统沿线的道路路面状况。该数据产品包含美国国家交通绩效评估框架下的基础设施状况指标，具体涵盖优、良、差三个等级的路面状况评级。上述评级依据路面类型的不同，基于平整度、开裂、车辙与错台四项指标计算得出。 MDOT SHA 路面状况（NHS）数据由MDOT SHA材料技术办公室（Office of Materials Technology, OMT）所有并维护。该数据产品每年针对上一年度的数据进行定期更新，本次发布的为2024年度版本。尽管该数据产品整体由MDOT SHA持有并维护，但数据中同时包含由其他联邦、州、县及地方政府机构负责养护的道路路面状况信息。各线性路段的属性值可用于进一步查询道路养护责任主体的相关信息。 MDOT SHA 路面状况（NHS）数据包含针对每个路面路段计算得出的优、良、差三项性能指标，具体计算依据《联邦法规汇编》（Code of Federal Regulations）第23篇第490部分C子章《评估路面状况的国家绩效管理标准（National Performance Management Measures for Assessing Pavement Condition）》中的规定。具体评级规则如下： ### 国际平整度指数（International Roughness Index, IRI）状况评级 所有路面类型均采用以下标准判定： - 路段IRI值小于95时，平整度评级为优； - 路段IRI值介于95至170之间时，平整度评级为良； - 路段IRI值大于170时，平整度评级为差。 ### 开裂状况评级 1. 沥青路面路段： - 若路段的开裂百分比（Cracking_Percent）值小于5%，开裂评级为优； - 若路段的开裂百分比（Cracking_Percent）值大于等于5%且小于等于20%，开裂评级为良； - 若路段的开裂百分比（Cracking_Percent）值大于20%，开裂评级为差。 2. 接缝混凝土路面路段： - 若路段的开裂百分比（Cracking_Percent）值小于5%，开裂评级为优； - 若路段的开裂百分比（Cracking_Percent）值大于等于5%且小于等于15%，开裂评级为良； - 若路段的开裂百分比（Cracking_Percent）值大于15%，开裂评级为差。 3. 连续配筋混凝土路面（CRCP）路段： - 若路段的开裂百分比（Cracking_Percent）值小于5%，开裂评级为优； - 若路段的开裂百分比（Cracking_Percent）值大于等于5%且小于等于10%，开裂评级为良； - 若路段的开裂百分比（Cracking_Percent）值大于10%，开裂评级为差。 ### 车辙或错台状况评级 1. 沥青路面： - 若路段的车辙值（rutting value）小于0.20英寸，车辙评级为优； - 若路段的车辙值（rutting value）大于等于0.20英寸且小于等于0.40英寸，车辙评级为良； - 若路段的车辙值（rutting value）大于0.40英寸，车辙评级为差。 2. 接缝混凝土路面： - 若路段的错台值（faulting value）小于0.10英寸，错台评级为优； - 若路段的错台值（faulting value）大于等于0.10英寸且小于等于0.15英寸，错台评级为良； - 若路段的错台值（faulting value）大于0.15英寸，错台评级为差。 ### 整体路面状况评级 整体路面状况评级需结合路面类型，综合考虑IRI、开裂以及车辙/错台三项指标计算得出，具体规则如下： - 优：对于沥青路面和接缝混凝土路面，三项指标（IRI、开裂、车辙/错台）均为优；对于连续混凝土路面，IRI和开裂两项指标均为优。 - 差：对于沥青路面和接缝混凝土路面，至少两项指标为差；对于连续混凝土路面，IRI和开裂两项指标均为差。 - 良：除上述情况外的所有其他组合。 如需获取更多信息，请联系MDOT SHA信息技术办公室（OIT）企业信息服务部门，邮箱：[e-mail]