It is the purpose of this chapter to outline the minimum content of a traffic impact analysis where required. A traffic impact analysis responds to a wide variety of issues, varying with the type of development, location of the proposed project, and existing traffic patterns. There are a number of issues that are incorporated into a traffic impact analysis to ensure an efficient and comprehensive review of the impacts associated with a development proposal.
(Ord. 1694 § 1 (Att. A-2), 2024)
A. 
A traffic impact analysis shall be submitted with a development permit application when it is determined by the city engineer that a development meets any of the following:
1. 
Generates 20 peak hourly trips or 200 average daily trips;
2. 
Exceeds the current or projected level of service of the roadway system adjacent to the development; or
3. 
The proposal would affect existing traffic problems in the local area of the project such as an area with a high accident ratio, confusing intersection, or other problems identified by the city engineer; or
4. 
A traffic impact analysis may also be required by the city engineer when it is determined that a development proposal may significantly impact adjacent areas.
B. 
Traffic impact analyses shall be prepared by a qualified engineer approved by the city engineer.
(Ord. 1694 § 1 (Att. A-2), 2024)
A traffic impact analysis shall contain the following information:
A. 
Introduction and Summary.
1. 
Purpose of report and study objectives;
2. 
Executive summary:
a. 
Site location and study area;
b. 
Development description;
c. 
Principal findings;
d. 
Conclusions;
e. 
Recommendations and proposed mitigation measures.
B. 
Proposed development and summary of the development proposal, including the following:
1. 
Land use and intensity;
2. 
Location;
3. 
Site plan;
4. 
Zoning;
5. 
Phasing and timing.
C. 
Area conditions including the following:
1. 
Study area:
a. 
Area of influence;
b. 
Area of significant traffic impact.
2. 
Study area and land use:
a. 
Existing land uses;
b. 
Existing zoning;
c. 
Anticipated future development.
3. 
Site accessibility:
a. 
Existing and future area roadway system;
b. 
Traffic volumes and conditions;
c. 
Transit service;
d. 
Existing relevant transportation system management programs;
e. 
Other issues as determined by the city engineer and director.
D. 
Projected Traffic.
1. 
Site traffic for each horizon year:
a. 
Trip generation;
b. 
Trip distribution;
c. 
Modal split;
d. 
Trip assignment.
2. 
Through traffic (each horizon year):
a. 
Method of projection;
b. 
Nonsite traffic in study area including the method of projections, trip generation, trip distribution, modal split, and trip assignment;
c. 
Through traffic;
d. 
Estimated volumes.
3. 
Total traffic (each horizon year).
E. 
Traffic analysis including the following:
1. 
Site access;
2. 
Capacity and level of service, as defined in the comprehensive plan;
3. 
Traffic safety;
4. 
Traffic signals;
5. 
Site circulation and parking.
F. 
Improvement Analysis.
1. 
Improvements to accommodate base traffic;
2. 
Additional improvements to accommodate site traffic;
3. 
Alternative improvements;
4. 
Status of improvements already funded, programmed, or planned;
5. 
Evaluation.
G. 
Findings.
1. 
Site accessibility;
2. 
Traffic impacts;
3. 
Need for any improvements and financing plan;
4. 
Compliance with applicable codes.
H. 
Recommendations and Proposed Mitigation.
1. 
Site access/circulation plan;
2. 
Roadway improvements including on site, off site and a phasing plan when appropriate;
3. 
Transportation system management actions including off site, on site and operational.
I. 
Conclusions.
(Ord. 1694 § 1 (Att. A-2), 2024)