Morrisville UDO - June 2017 version

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Article 5: Development Standards
Section 5.8. Access and Circulation
5.8.6. Vehicular Access and Circulation
June 23, 2017 Morrisville, NC
Page 5-42 Unified Development Ordinance
Thresholds for a Transportation Impact Analysis
a. General Thresholds
(1) A TIA is required if one or more of the following thresholds are met.
(A) The proposed development is expected to generate 100 or more vehicle trips over
any one-hour period or 1,000 or more trips per day based on the most recent
edition of the Institute of Transportation Engineers (ITE) Trip Generation Manual;
(B) There are existing issues with complex roadway geometry or intersection features
(e.g. design and/or capacity) within the study area; or
(C) There are significant potential changes to adjacent development traffic patterns as
a result of the proposed development.
(2) A reduced set of analysis requirements, as determined by the Planning Director, may be
required if one or more of the following thresholds are met.
(A) A proposed amendment to the Comprehensive Plan, Town Center Plan, and/or
other small area plan would redesignate the development site to a more intensive
trip generation land use classification (e.g., Low Density Residential to Medium
Density Residential);
(B) An amendment to the Transportation Plan is proposed;
(C) A rezoning application proposes reclassification of the development site to a more
intensive trip generation zoning district (e.g., Low Density Residential District to
Medium Density Residential District) that is not consistent with the adopted
Comprehensive Plan;
(D) The proposed development does not meet any of the thresholds in subsection
but is located on a roadway that has an existing capacity issue; or
(E) A proposed revision to an approved, built out, or partially built out development:
(i) Has an existing TIA that is less than two years old, as determined by comparing
the submittal date on the TIA report and the submittal date of the proposed
amendment;
(ii) Requires a change in access, intensity, or type of development; or
(iii) Is impacted by any major changes to the roadway system, such as but not
limited to, road closures and new thoroughfares.
General Requirements
a. Preparer Qualifications
The analysis shall be prepared by a Professional Engineer licensed by the State of North
Carolina and having expertise in traffic engineering.
b. Scoping Meeting
Prior to submitting any analysis, the Professional Engineer preparing the analysis shall meet
with the Planning Director to determine the following:
(1) Study area boundary (See Section ;
(2) Trip generation assumptions;
(3) Growth Rate for future year traffic estimation;
(4) Trip distribution;
(5) Pass-by traffic and/or internal capture;