Scenario:
A new development has been proposed at the Northwest corner of Broad Street (SR-16) and Mink Street
in Pataskala Township, Licking County, Ohio. The site to be developed is approximately 57 acres in size.
The development program consists of a residential subdivision consisting of 230 single-family detached
housing units (ITE LUC 210). A preliminary site plan has been provided below. Two access driveways for
the residential portion have been proposed with the approximate location of the access driveways
shown on the attached proposed site plan. The opening year for the development is 2025.
Complete a detailed traffic impact analysis of the proposed development. Initial discussion between the
study area to include the following four intersections, two existing and two proposed:
• Broad Street SW (SR-16) @ Mink Street SW
• Broad Street SW (SR-16) @ Summit Road SW
• Broad Street SW (SR-16) @ Residential Access Driveway
• Mink Street SW @ Residential Access Driveway
The two existing intersections are both signalized. Traffic data available from the ODOT TDMS include
traffic counts obtained in 2021 (count location #2445) and AM/PM Peak Hour Turning Movement
Counts for Mink Street and Summit Road Intersections. The TMC provided is dated 2016 but the turn
percentages are assumed to be applicable for this analysis. Additionally, an output from the ODOT SHIFT
program for the Broad Street (SR-16) roadway segment provides an ADT forecast for the year 2020 can
see below.
Technical Specifications for Traffic Analysis:
Because of the proposed driveway connections to the State of Ohio highway network, the Highway
Department has requested that all site design and analyses comply with the applicable requirements
outlined in the Ohio Department of Transportation’s State Highway Access Management Manual current
edition and other references applicable.
All traffic operational analysis shall be conducted using HCM 2010 methodology and the HCS 2010
software shall be used for such analyses. The study period shall be the PM Peak Hour of Adjacent Street
Traffic for traffic analysis.
Submit a memorandum describing its preliminary analysis of the following elements of the traffic impact
analysis:
• Trip Generation, Trip Distribution, and Traffic Assignment (Driveway Percentages)
• Current Year (2022) Traffic Volumes and Turn Movement Counts
• Analysis of Year and Growth Rate
• Opening Year and Analysis Year Traffic Volumes and Turn Movement Counts
The memorandum should document all calculations and clearly state all assumptions used in the
preliminary analysis. The memorandum should also include a list of questions that may have regarding
the technical parameters of the analysis if any
Existing Conditions Analysis
The memorandum describes the traffic conditions (i.e., LOS) for the two existing intersections for the
design year with background traffic only (“No Build” condition) and the design year with the background
traffic plus the site traffic on existing infrastructure (“Build Condition 1”).
This memorandum shall also include a preliminary analysis of the design requirements for the two
proposed site access driveways, including traffic signal warrant analysis and turn lane warrant analysis
based on ODOT requirements. This memorandum shall be submitted via Blackboard by the date shown
at the top of this handout
Final Report
Submit a final report describing the analysis and recommendations from the traffic impact analysis. The
final report shall address all items as outlined in ODOT guidelines, including capacity analysis, turn
lane/signal warrant analysis, and driveway spacing verification. The report should address the traffic
impact of the proposed development at the study intersections and site driveways and clearly state the
recommended improvements required for each intersection/driveway to achieve the target LOS for the
design year. The analysis should also determine if the installation of traffic signals and/or turn lanes are
warranted for each intersection/driveway. Verify the spacing and location of the proposed access
driveways and recommend changes if appropriate.
Additionally, the final analysis should include a table showing the dimensions of turn lanes, driveway
width and depth, and curb radii for an appropriate design vehicle for each driveway in accordance with
ODOT requirements and typical practices. Based on the driveway specifications, the report shall include
a neat sketch (i.e., AutoCAD or Hand ) of the two proposed site driveways showing the dimensions of all
relevant parameters associated with each driveway design.
Sample Solution