Road Inventory
Ohio's official road network: every roadway ODOT maintains or takes a particular interest in, with the physical and administrative detail that describes it — mileage, lane miles, functional class, federal aid eligibility and traffic. This is the state's certified source for road mileage, and the base network most other roadway data sets here reference.
- Published by
- ODOT Office of Technical Services, Roadway Information GIS
- Source
- Ohio Department of Transportation TIMS
- Original data
- tims.dot.state.oh.us
- Terms of use
- Public information, no warranty (ODOT)
- On the map
- Lines
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Inventory of various physical and administrative data related to the roadway networks that are either maintained by or are of special interest to the Ohio Department of Transportation, maintained by the Transportation Information Management Section of the Office of Technical Services, and considered the State’s “official” source for certified mileage, lane miles, Federal Aid eligibility, and HPMS.
Questions answered with this data
- Color every state-highway segment by its fatal and serious-injury crash rate per 100 million vehicle miles over 2021–2025, in quintiles, and mark the worst 25 stretches on top.
- For the MORPC area around Columbus, compute fatalities, serious injuries, each as a count and as a rate per 100 million vehicle miles, and non-motorized fatalities and serious injuries, for each of the last five years, and map where they fall.
- The NOACA area around Cleveland has $10 million for safety improvements on state routes. Choose where to spend it to prevent the most fatal and serious-injury crashes, using 2021–2024 crashes and two countermeasures. The first is centerline and shoulder rumble strips at $25,000 per mile, which cut lane-departure crashes by 30% on two-lane segments posted 45 mph or higher. The second is roundabouts at $2 million each, which cut angle crashes by 60% at intersections. Rank candidates by crashes prevented per dollar, pick the best mix within the budget, and map the chosen segments and intersections with the expected crashes prevented at each.
Fields
What each record holds, as the publisher describes it: 105 fields.
| Field | Description |
|---|---|
ObjectID OBJECTID | |
PERP_YEAR | Calendar year in which a RI event occurs (like new constructions, abandoning of roads, annexations, increase in speed limit, and so on) on a roadway and is recorded in ODOT’s RI database. |
LAST_MODIFIED_DATE | Date the record was last modified by the Road Inventory GIS team |
ODOT_DISTRICT | From 1-12 plus Central Office – the counties are grouped into districts in Ohio for ease of maintenance and funding |
NLF_ID | Network Linear Feature Identifier. Primary key field that allows ODOT’s graphic roadway network geometric segments to be linked to business data attributes. |
JURISDICTION_CD | Type of jurisdiction to which the section of the route belongs. C-county, F-federal, M-municipal, P-private, S-state, T-township. |
COUNTY_CD | The 3-letter code of the county within Ohio (88 counties total) |
ROUTE_TYPE | Two letter code indicating the basic transportation grouping or system that the route belongs to - third component of the NLFID. IR-interstate, US-US route, SR-state route, etc |
ROUTE_NBR | Route number associated with the section of the route |
ROUTE_SUFFIX | Route suffix used to differentiate routes with similar route numbers. |
ROUTE_EXTENSION_CD | Route suffix provides additional context or definition of route naming or usage. |
CARDINALITY_CD | Cardinal/non-cardinal direction of the route. All roadways are inventoried in the predominant direction from south to north and west to east. |
CTL_BEGIN_NBR | The point of origin for a given section of road. All routes are county-based, generally beginning at 0.000 where a segment begins. CTL-county true log. |
CTL_END_NBR | The terminus point for a given section of road. CTL-county true log |
SEGMENT_LENGTH_NBR | The measured length for a given section of road |
LEAVE_IND | Used to indicate where a route leaves, or ends, at a physical gap between two segments of the same route number that are not connected. |
REENTER_IND | Used to indicate where a route re-enters or begins after a physical gap between two segments with the same route number that are not connected. |
GAP_LEAVE_IND | Gap leave indicator |
GAP_REENTER_IND | Gap reenter indicator |
OVERLAP_INDICATOR | Indicates if the route is primary or secondary in situations where multiple route numbers are concurrent on a section of roadway. |
COUNTY_SPLIT_INDICATOR | Indicates if the route is primary or secondary in situations where the route is shared between two counties. |
FUNCTION_CLASS_CD | The organization of roadways into a hierarchy based on the character of service provided. 1- Principal arterial interstate, 2-Principal arterial freeway, 3-Principal arterial other, 4-Minor arterial, 5-Major collector, 6-Minor collector, 7-Local. |
AREA_CODE_NBR | U.S. Census Urban Area Code associated with the section of roadway |
NHS_CD | Indicates if the road is included in the National Highway System, a federally designated network of roads that are eligible for priority federal aid funding. N-NHS, H-Congressional corridor, S-STRAHNET, C-STRAHNET connector, 2-Airport, 3-Port, 4-Amtrak, 5-Rail/truck terminal, 6-Bus terminal, 7-Multi-modal terminal, 8-Pipeline terminal, 9-Ferry terminal |
STRAHNET_CD | A roadway segment that is a component of the Strategic Highway Supply Network (STRAHNET) which provides defense access, continuity and emergency capability for the movement of personnel and equipment in peacetime and war. S-STRAHNET, C-STRAHNET Connector |
NHS_INTERMODAL_FACILITY_CD | A numeric identifier of an FHWA approved Intermodal facility. |
DIVIDED_HWY_IND | Indicates whether a roadway segment is part of a divided highway, or dual carriageway. |
MEDIAN_TYPE_CD | Type of median. 1-None, 2-Unprotected, 3-Curbed, 4-Positive barrier unspecified, 5-Positive barrier flexible, 6-Positive barrier semi-rigid, 7-Positive barrier rigid |
MEDIAN_WIDTH_NBR | The physical width of a median. |
LANES_NBR | Number of lanes in both directions carrying through traffic |
LANE_WIDTH_NBR | The physical width of a lane. |
SPEED_LIMIT_NBR | The posted speed limit. |
ACCESS_CONTROL_CD | Degree of access control for a given section of the road. F-Full, L-Partial, N-No access control exists. |
ACCESS_CONTROL_OPNL_CD | Degree of access control for a given section of the road. 1-Full, 2-Partial, 3-No access control exists. |
DIRECTION_OF_TRAVEL_CD | The direction of travel flow. B-Two way, F-One way following the cardinal direction, T-One way following the non-cardinal direction |
FACILITY_TYPE_CD | Operational description. 1-One way, 2-Two way, 4-Ramp, 5-Non mainline, 6- Non inventory direction, 7-Planned/unbuilt |
FAP_IND | Indicates if the record is included in the historical Federal Aid Priority System, primarily a rural system of major highways that connected centers of population. |
PRIORITY_SYSTEM_CD | An ODOT administrative classification for state system roadways. P-Priority system, U-Urban, G-General |
SEGMENT_DESCRIPTION_TXT | Describes important events for a given section of the road. |
MILEAGE_CLASS | Jurisdiction of the roadway segment. 0-N/A, 1-Rural, 2-Municipal, 3-Rural/municipal divided, 4-Municipal/municipal divided, 5-Rural/rural divided |
ROADWAY_CLASS | Classification system to support ODOT reporting. 0-Public, 1-Private, 2-Proposed, 3-Impassable, 4-Other |
STATE_CODE_LEFT | When a route is split along a state boundary, this identifies the state on the left half of the roadway. |
STATE_CODE_RIGHT | When a route is split along a state boundary, this identifies the state on the right half of the roadway. |
COUNTY_CODE_LEFT | Identifies the county where the left half of a road resides. |
COUNTY_CODE_RIGHT | Identifies the county where the right half of the road resides. |
TWP_CODE_LEFT | Identifies the township where the left half of a road resides. |
TWP_CODE_RIGHT | Identifies the township where the right half of the road resides. |
MUNI_CODE_LEFT | Identifies the municipal corportation where the left half of a road resides. |
MUNI_CODE_RIGHT | Identifies themunicipal corportation where the right half of the road resides. |
MUNI_POPULATION_LEFT_NBR | Reported U.S. Census population for the municipality on the left half of a roadway resides |
MUNI_POPULATION_RIGHT_NBR | Reported U.S. Census population for the municipality on the right half of a roadway resides |
TAG_REVENUE_ELIGIBLE | Identifies whether a road segment is eligible for local certified mileage payment. 0-Not eligible, 1-Entire segment length eligible, 2-Half of the segment length eligible |
SCENIC_BYWAY_CD | Identifies whether a road segment is designated as a scenic highway. A-All American Road, N-National Scenic Byway, S-State Scenic Byway |
SCENIC_ROUTE_NUMBER | The ID number associated with the scenic byway |
SHOULDER_TYPE_CD | Type of shoulder material. 1-None, 2-Bituminous concrete, 3-Portland cement concrete, 4-Stabilized material, 5-Combination, 6-Earth, 7-Barrier curb |
SHOULDER_TOTAL_WIDTH_LT | Width of left (outside) shoulder, including both paved and unpaved parts measured from the center of the edge line outward |
SHOULDER_TOTAL_WIDTH_RT | Width of the paved portion of the right (outside) shoulder measured from the center of the edge line outward |
SHOULDER_PVD_WIDTH_IN_LT | Width of the paved portion of the left (inside) shoulder measured from the center of the edge line outward |
SHOULDER_PVD_WIDTH_IN_RT | Width of the paved portion of the right (inside) shoulder measured from the center of the edge line outward |
SHOULDER_PVD_WIDTH_OUT_LT | Width of the paved portion of the left (outside) shoulder measured from the center of the edge line outward |
SHOULDER_PVD_WIDTH_OUT_RT | Width of the paved portion of the right (outside) shoulder measured from the center of the edge line outward |
STREET_PREFIX_DIR_CD | Identifies named street direction (if applicable), such as “North,” “South,” etc. |
STREET_NAME | Identifies posted name of a road segment |
STREET_SUFFIX_CD | Identifies postal code abbreviation (if applicable), such as “Rd,” “Blvd,” etc. |
STREET_DIR_SUFFIX_CD | Identifies named street direction (if applicable), such as “NE,” “SW,” etc. |
BASE_TYPE_LEFT_CD | Identifies material type under the surface layer of the road, on the left side or non-cardinal segment. F-Crack and seat, H-Rubblization and roll, I-Aggregate base 304, L-Bituminous concrete mix, N-Plain concrete, P-Reinforced concrete, R-Brick flexible, T-Brick rigid. |
BASE_TYPE_RIGHT_CD | Identifies material type under the surface layer of the road, on the right side or cardinal segment. F-Crack and seat, H-Rubblization and roll, I-Aggregate base 304, L-Bituminous concrete mix, N-Plain concrete, P-Reinforced concrete, R-Brick flexible, T-Brick rigid. |
SURFACE_TYPE_LEFT_CD | Identifies surface material of the road, on the left side or non-cardinal segment. A-Combination, B-Brick, C-Continuous reinforced, D-Reinforced concrete, E-Plain concrete, G-Bituminous concrete, I-Chip seal on granular, K-Open graded bituminous, L-Chip seal or micro, M-Gravel, U-Unimproved, X-Right of way only |
SURFACE_TYPE_RIGHT_CD | Identifies surface material of the road, on the right side or cardinal segment. A-Combination, B-Brick, C-Continuous reinforced, D-Reinforced concrete, E-Plain concrete, G-Bituminous concrete, I-Chip seal on granular, K-Open graded bituminous, L-Chip seal or micro, M-Gravel, U-Unimproved, X-Right of way only |
SURFACE_WIDTH_LEFT | Identifies the total width of the “drivable” portion of a route segment (or all lanes combined), on the non-cardinal side of a segment. |
SURFACE_WIDTH_RIGHT | Identifies the total width of the “drivable” portion of a route segment (or all lanes combined) on the cardinal side of a segment. |
PVMT_TYPE_LEFT_CD | Pavement type left |
PVMT_TYPE_RIGHT_CD | Pavement type right |
ROADWAY_WIDTH | Total pavement width of a road segment |
TRUCK_ROUTE_IND | Identifies if road segment is designated as part of the National Truck Network |
RESURFACE_YEAR | The last reported calendar year the pavement was resurfaced |
ADJ_NLF_ID | For routes split at a county line, the corresponding NLFID (AKA the adjoining county NLFID) |
ADJ_CTL_BEGIN_NBR | A derived field for a county line split route scenario. Identifies the corresponding CTL_BEGIN_NBR value for the segment. |
ADJ_CTL_END_NBR | A derived field for a county line split route scenario. Identifies the corresponding CTL_END_NBR value for the segment. |
HPMS_SAMPLE_ID | Random sample of route segments to submit for HPMS reporting., the system used by FHWA to collect roadway data from each state to facilitate consistent reporting on the condition and performance of the nation's highways |
ADT_PSNGR_CAR_NBR | Average annual daily traffic - passenger cars |
ADT_TRUCK_NBR | Average annual daily traffic - trucks |
ADT_TOTAL_NBR | Average annual daily traffic - total |
ADT_YEAR_NBR | The year represented by the average annual daily traffic counts |
ROADWAY_INVENTORY_ID | Auto-generated ID |
LEAVE_REENTER_TYPE_CD | Leave/re-enter type |
OVERLAP_INVERSE_IND | Overlap inverse indicator |
SPLIT_JUR_INVERSE_IND | Split jurisdiction inverse indicator |
SPLIT_JUR_OVERLAP_ID | Split jurisdiction overlap id |
PRIMARY_OVERLAP_ID | primary overlap id |
STL_BEGIN_NBR | State True Log - begin number |
STL_END_NBR | State True Log - end number |
NLF_ID_ST | State NLFID |
PRIMARY_IND | Indicates if the section of the route is a primary or secondary route |
MUNI_FIPS_CODE_LEFT | Federal FIPS code for a municipality on the left side of the roadway segment |
MUNI_FIPS_CODE_RIGHT | Federal FIPS code for a municipality on the right side of the roadway segment |
TWP_FIPS_CODE_LEFT | Federal FIPS code for a township on the left side of the roadway segment |
TWP_FIPS_CODE_RIGHT | Federal FIPS code for a township on the right side of the roadway segment |
BIKE_LANE_TYPE_CD | Identifies the presence and type of a bike lane |
BIKE_LANE_WIDTH_NBR | The physical width of a bike lane |
FREIGHT_NETWORK_CD | Indicates if the road is included in the National Highway Freight Network |
SEGMENT_DIRECTION | Identifies the predominate direction of the route segment |
THROUGH_LANES | The number of lanes designated for through traffic |
TURN_LANE_LT_CD | The presence of left turn lanes at a typical intersection |
TURN_LANE_RT_CD | The presence of right turn lanes at a typical intersection |