Article 5: Development Standards
Section 5.8. Access and Circulation
5.8.6. Vehicular Access and Circulation
Morrisville, NC
June 23, 2017
Unified Development Ordinance
Page 5-43
(6)
Nontraditional peak hour studies, if required;
(7)
Whether or not truck or heavy vehicle distributions need to be considered separately;
(8)
Approved development applications within the study area;
(9)
Funded capital improvement projects (Town, State, and federal) that will increase the
capacity of the facilities in question;
(10)
Site construction phasing;
(11)
If a signal warrant analysis for high volume unsignalized intersections is needed;
(12)
The parameters of the Memorandum of Understanding (MOU); and
(13)
Any questions, issues, or assumptions that must be taken into account or addressed.
c.
Memorandum of Understanding
The Town will prepare a Memorandum of Understanding (MOU) that outlines the agreements
made during the scoping meeting. The applicant shall return the signed MOU to the Planning
Director. The Professional Engineer cannot begin work on the analysis until both the Town and
the applicant have signed the MOU.
d.
Analysis Period
The analysis shall examine future traffic conditions one year after the proposed development
is scheduled to be completed (build +1).
e.
Analysis Software
The study shall be performed using the operational analysis of the latest Highway Capacity
Manual and the preferred software listed in the Table
5.8.6.B.3.e,Preferred Software. Other
software packages such as Synchro are preferred for coordinated signal systems and may be
required for supplemental analysis.
Table
5.8.6.B.3.e:Preferred Software [1]
Items for Analysis
Software [2]
Multiple Intersections
Synchro
Isolated Signalized Intersections
Synchro
Isolated Unsignalized Intersections
Synchro, HCS
Simulation
SimTraffic, VISSIM, CORSIM
Roundabouts
SIDRA, VISSIM
Roadway Segment
HCS
Merge, Diverge, and Weave
HCS
Notes:
[1] Use of alternate analysis software must be approved by the Town of Morrisville; however, the above
software is not specifically endorsed by the Town of Morrisville.
[2] Version of software currently in use by NCDOT
(Ord. No. 2016-001, 05/10/2016)
f.
Analysis Study Area Boundary
(1)
The analysis study area shall at a minimum include any roadways and intersections within
one-half mile of the proposed development.
(2)
The analysis study area may be modified if the Planning Director:
(A)
Determines a larger study area or additional roadways or intersections for analysis
are required due to the size or characteristics of the proposed development; or
(B)
Waives the need to study roadways or intersections that are determined not to be
significantly affected by the proposed development, as long as all key intersections
within the study area are studied.