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Traffic Studies and Statistics

Annual Highway Mileage Reports
The annual mileage reports show miles, lane miles and Annual Vehicle Miles of Travel (AVMT) for all State, County and Municipally maintained roads in Maryland

Annual Vehicle Miles of Travel Report
This report contains Annual Vehicle Miles of Travel (AVMT) by County and Functional Classification for State, County, and Municipal Highway Systems

Note: Beginning in 2016 this report is displaying the current FHWA Functional Classification Codes (1-7). We also added Rural Principal Arterial and Other Freeways and Expressways and Urban Minor Collector as a result of the new FHWA Functional Classification Codes.

Congestion Assessment
Congestion assessment maps show levels of congestion on all major state roadways in Maryland, on an average weekday, during the morning (AM) and evening (PM) peak hours using a combination of Probe and HCM based analysis.

Highway Location Reference (HLR)
The HLR lists provide mile points of intersecting features and commonly requested data elements for all roads maintained by the SHA and the Maryland Transportation Authority (MdTA).

Highway Performance Monitoring System (HPMS)
HPMS is a nationwide FHWA road inventory database that is used to report on the extent, condition, performance, use, and operating characteristics of the Nation’s highways.

Highway System Mileage by Year Report (1980 - present)
This report contains Highway Miles and Lane Miles by Year for State, County, and Municipal Highway, from 1980 – present

Maryland Interstate and Beltway Mileage Report
This report contains Highway Miles for Maryland’s Interstate Highway System by Route Number and mileage on the Baltimore and Capital Beltways.

Mileage Inside the Municipalities Reports
This annual report summarizes mileage of state, county and municipal roadways, as well as the mileage of roads within a municipality.

Traffic Monitoring System (TMS)
The TMS provides data, statistics, reports and maps associated with the SHA’s traffic count program.