Adjusted Urbanized Areas

ODOT's Adjusted Urbanized Areas are US Census Urban Area boundaries expanded through a cooperative process by responsible state and local officials. Urbanized boundaries are used to determine a roadway’s functional class, federal aid eligibility, and speed limit transition points, in accordance with 23 U.S.C. 101 and O.R.C 4511.21.

Published by: ODOT Technical Services
Source: Ohio Department of Transportation TIMS
Original data: tims.dot.state.oh.us
Terms of use: Public information, no warranty (ODOT)
On the map: Areas

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Questions answered with this data

For the MVRPC metropolitan planning area around Dayton (the MVRPC polygon in the MPO data set, which covers Montgomery, Miami, Greene and the northern part of Warren County), count fatal and serious-injury crashes for each year from 2021 through 2025, counting each crash report once by its crash severity. Use the same scope as MVRPC's Safety Action Plan: leave out crashes on restricted-access freeways (functional class 1 and 2, which covers I-70, I-75, I-675 and the freeway sections of US 35 and SR 4), crashes on freeway ramps, and crashes with no location. Split each year into urban and rural, where urban means inside ODOT's Adjusted Urbanized Areas. Show one table with a row per year and columns for urban fatal, rural fatal, urban serious injury, rural serious injury, and total fatal plus serious injury. Then show a second table, by year, of the fatal and serious-injury crashes that the freeway and ramp exclusions removed. Map the counted crashes colored by severity, draw the excluded freeway crashes in gray, and outline the MVRPC boundary and the urbanized areas.

Fields

What each record holds, as the publisher describes it: 5 fields.

Field	Description
Population POPULATION	Population of the Urban Area
Urban_Area_Type URBAN_AREA_TYPE	Type of Urban Area
Area_SqMi AREA_SQMI	Size of the Urban Area In square miles
Urban_Area_Code URBAN_AREA_CD	U.S. Census Urban Area Code associated with the section of roadway
URBAN_AREA_NAME	Name of Urban Area

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