These road infrastructure figures cover the measurement periods and populations identified in the available source material. Estimates, surveys and forecasts retain their reported scope.
Key Road Infrastructure Statistics
The main findings are:
- The U.S. grand total public-road network was 4,219,172 miles in 2023, including Puerto Rico (United States and Puerto Rico public roads).
- Local roads made up 2,914,334 miles, or 69% of the U.S. road system, in 2024 (United States public roads).
- There were 620,762 bridges on public roads in the 50 states and D.C. in 2024.
- The World Bank Rural Access Index measures the share of rural people living within 2 km of an all-season road (Indicator definition, 2024 catalog; Countries reporting SDG 9.1.1).
- The OECD transport-infrastructure dataset contains 47,342 unfiltered data points in the displayed Data Explorer (Data Explorer display accessed 2026; OECD ITF dataset).
- Texas had 322,113 total public-road miles in 2023, the largest state total in FHWA HM-10.
- The 50 states and District of Columbia had 4,199,208 public-road miles in 2023 (50 states and D.C.).
- Collectors accounted for 822,038 miles, or 20% of U.S. road miles, in 2024 (United States public roads).
- The NHS contained 146,594 bridges in 2024 (United States NHS).
- Mozambique had about 29,800 km of classified roads, of which about 8,300 km, or 27%, were paved (2017 analysis; Mozambique classified road network).
- California had 177,334 total public-road miles in 2023.
- Rural public roads accounted for 2,944,120 miles in the 50 states and D.C. in 2023 (50 states and D.C., rural roads).
- Arterials accounted for 472,082 miles, or 11% of U.S. road miles, in 2024 (United States public roads).
- Interstates contained 58,504 bridges in 2024 (United States Interstate System).
- Mozambique’s classified-road density was 3.8 km per 100 km² of land (2017 analysis).
Contents
- Key Road Infrastructure Statistics
- Road infrastructure statistics: U.S. road-network scale and ownership
- Road infrastructure data by road class, lane use and travel
- Bridge and tunnel infrastructure statistics and condition
- Rural road access and paved-road infrastructure worldwide
- Road infrastructure investment, maintenance and access outcomes
- Road infrastructure statistics by state and international case study
Road infrastructure statistics: U.S. road-network scale and ownership
- The U.S. grand total public-road network was 4,219,172 miles in 2023, including Puerto Rico (United States and Puerto Rico public roads). (Table HM-10 – Highway Statistics…)
- The 50 states and District of Columbia had 4,199,208 public-road miles in 2023 (50 states and D.C.). (Table HM-10 – Highway Statistics…)
- Rural public roads accounted for 2,944,120 miles in the 50 states and D.C. in 2023 (50 states and D.C., rural roads). (Table HM-10 – Highway Statistics…)
- Urban public roads accounted for 1,255,071 miles in the 50 states and D.C. in 2023 (50 states and D.C., urban roads). (Table HM-10 – Highway Statistics…)
- County governments owned 1,533,768 rural public-road miles in 2023 (50 states and D.C., county-owned rural roads). (Table HM-10 – Highway Statistics…)
- Town, township and municipal governments owned 522,060 rural public-road miles in 2023 (50 states and D.C.). (Table HM-10 – Highway Statistics…)
- State highway agencies owned 654,732 rural public-road miles in 2023 (50 states and D.C.). (Table HM-10 – Highway Statistics…)
- State highway agencies owned 169,807 urban public-road miles in 2023 (50 states and D.C.). (Table HM-10 – Highway Statistics…)
- Federal agencies accounted for 153,797 rural public-road miles in 2023 (50 states and D.C.). (Table HM-10 – Highway Statistics…)
- Federal agencies accounted for 5,506 urban public-road miles in 2023 (50 states and D.C.). (Table HM-10 – Highway Statistics…)
FHWA grand total includes Puerto Rico.
Public roads only.
FHWA rural classification.
FHWA urban classification.
Ownership categories are FHWA reporting categories.
FHWA category combines town, township and municipal ownership.
FHWA ownership total.
Federal roads not part of state/local systems are included.
FHWA federal-agency ownership category.
Road infrastructure data by road class, lane use and travel
- Local roads made up 2,914,334 miles, or 69% of the U.S. road system, in 2024 (United States public roads). (Roads | Our Nation’s Highways…)
- Collectors accounted for 822,038 miles, or 20% of U.S. road miles, in 2024 (United States public roads). (Roads | Our Nation’s Highways…)
- Arterials accounted for 472,082 miles, or 11% of U.S. road miles, in 2024 (United States public roads). (Roads | Our Nation’s Highways…)
- The National Highway System comprised 221,568 miles of U.S. public roads in 2024 (United States National Highway System). (Roads | Our Nation’s Highways…)
- The NHS represented 5% of U.S. public-road mileage and carried 55% of all travel in 2024 (United States NHS). (Roads | Our Nation’s Highways…)
- Fifty-eight percent of NHS miles were rural and 42% were urban in 2024 (United States NHS). (Roads | Our Nation’s Highways…)
- The Interstate System, including Puerto Rico, measured 49,116 miles in 2024 (United States Interstate System). (Roads | Our Nation’s Highways…)
- Interstates represented 1% of all public roads but carried 26% of all travel in 2024 (United States Interstate System). (Roads | Our Nation’s Highways…)
- Sixty percent of Interstate miles were rural and 40% were urban in 2024 (United States Interstate System). (Roads | Our Nation’s Highways…)
- The Interstate System connected 46 of the 50 state capitals in 2024. (Roads | Our Nation’s Highways…)
Road hierarchy excludes no stated road class beyond FHWA table.
FHWA hierarchy classification.
NHS is a defined subset of public roads.
Travel share is FHWA all-travel measure, not road capacity.
FHWA rural/urban classification.
Includes Puerto Rico.
Travel share is FHWA all-travel measure.
Connectivity statement, not a mileage measure.
Bridge and tunnel infrastructure statistics and condition
- There were 620,762 bridges on public roads in the 50 states and D.C. in 2024. (Roads | Our Nation’s Highways…)
- The NHS contained 146,594 bridges in 2024 (United States NHS). (Roads | Our Nation’s Highways…)
- Interstates contained 58,504 bridges in 2024 (United States Interstate System). (Roads | Our Nation’s Highways…)
- Texas had 56,729 public-road bridges in 2024, including 18,317 NHS bridges. (Roads | Our Nation’s Highways…)
- Illinois had 26,928 public-road bridges in 2024, including 4,829 NHS bridges. (Roads | Our Nation’s Highways…)
- Ohio had 26,729 public-road bridges in 2024, including 4,948 NHS bridges. (Roads | Our Nation’s Highways…)
- California had 25,848 public-road bridges in 2024, including 10,905 NHS bridges. (Roads | Our Nation’s Highways…)
- Kansas had 24,894 public-road bridges in 2024, including 2,866 NHS bridges. (Roads | Our Nation’s Highways…)
- Missouri had 24,618 public-road bridges in 2024, including 3,663 NHS bridges. (Roads | Our Nation’s Highways…)
- Iowa had 23,719 public-road bridges in 2024, including 2,657 NHS bridges. (Roads | Our Nation’s Highways…)
- Pennsylvania had 23,299 public-road bridges in 2024, including 5,868 NHS bridges. (Roads | Our Nation’s Highways…)
- Oklahoma had 22,917 public-road bridges in 2024, including 3,138 NHS bridges. (Roads | Our Nation’s Highways…)
FHWA National Bridge Inventory count.
Subset of the National Bridge Inventory.
FHWA bridge inventory count.
Rural road access and paved-road infrastructure worldwide
- The World Bank Rural Access Index measures the share of rural people living within 2 km of an all-season road (Indicator definition, 2024 catalog; Countries reporting SDG 9.1.1). (Rural Access Index (RAI) -…)
- Mozambique had about 29,800 km of classified roads, of which about 8,300 km, or 27%, were paved (2017 analysis; Mozambique classified road network). (Estimating the Impact of Improved…)
- Mozambique’s classified-road density was 3.8 km per 100 km² of land (2017 analysis). (Estimating the Impact of Improved…)
- Kenya’s cited road density was 11 km per 100 km², versus 6 km per 100 km² for Tanzania (Comparison reported in 2017 paper; Kenya and Tanzania). (Estimating the Impact of Improved…)
- About 16 million people in Mozambique were estimated to lack access to the good road network in 2017. (Estimating the Impact of Improved…)
- Mozambique’s Rural Access Index was 19.3% in 2017, compared with 20.4% in 2010 (2010 and 2017). (Estimating the Impact of Improved…)
- Chokwe district in Mozambique had an estimated RAI of 60.8% in the paper’s 2017 analysis (Chokwe, Mozambique). (Estimating the Impact of Improved…)
- Most rural areas in the Mozambique study had an estimated RAI below 10% (2017 analysis; Most rural areas of Mozambique). (Estimating the Impact of Improved…)
This is an indicator definition; country estimates vary by reference year and data method.
The paper reports approximate network values and distinguishes classified from feeder roads.
Density excludes many unclassified feeder roads.
Comparative figures are quoted from the paper and may use differing national definitions.
Estimated population without access, not a census count.
RAI values are modeled/estimated indicators and are not directly comparable if methods changed.
District-level estimate from the study, not a national average.
The paper describes the distribution qualitatively; this is a threshold statement, not a mean.
Road infrastructure investment, maintenance and access outcomes
The OECD transport-infrastructure dataset contains 47,342 unfiltered data points in the displayed Data Explorer (Data Explorer display accessed 2026; OECD ITF dataset). (Transport infrastructure investment and maintenance…)
Dataset size is not a road-spending estimate and changes as data are revised.
Road infrastructure statistics by state and international case study
- Texas had 322,113 total public-road miles in 2023, the largest state total in FHWA HM-10. (Table HM-10 – Highway Statistics…)
- California had 177,334 total public-road miles in 2023. (Table HM-10 – Highway Statistics…)
- Illinois had 146,020 total public-road miles in 2023. (Table HM-10 – Highway Statistics…)
- Kansas had 138,975 total public-road miles in 2023. (Table HM-10 – Highway Statistics…)
- Missouri had 132,889 total public-road miles in 2023. (Table HM-10 – Highway Statistics…)
- Georgia had 127,279 total public-road miles in 2023. (Table HM-10 – Highway Statistics…)
- Florida had 124,310 total public-road miles in 2023. (Table HM-10 – Highway Statistics…)
- Ohio had 122,876 total public-road miles in 2023. (Table HM-10 – Highway Statistics…)
- Pennsylvania had 121,926 total public-road miles in 2023. (Table HM-10 – Highway Statistics…)
- Minnesota had 143,106 total public-road miles in 2023. (Table HM-10 – Highway Statistics…)
State total includes rural and urban roads and all listed ownership categories.
State total includes rural and urban roads.