A. Design
1 Street widths shall be per the adopted City Standards and Circulation Element of the Master Plan of Streets.
2 City standard travel lane width should be as follows:
a Traffic Lane on arterial or collector 12 feet
b Traffic Lane on arterial or collector adjacent to curb 14 feet
c Traffic Lane on residential street 10 feet
d Left Turn Lane 12 feet
e Two-way Turning Lane 12 feet
f Parking Lane 8 feet
3 The minimum acceptable lane width in the City shall not be less that 10 feet unless written approval is obtained from the Director of Public Works/City Engineer.
4 In areas where there is a raised median island, no openings shall be permitted in the median other than at street intersections. Medians are established for the control of traffic.
5 Transitions between differing curb widths or as required for pavement joins shall conform with standard Caltrans computational methods as detailed in Section 6-25 of the Caltrans Design Manual.
6 Sight distance at intersections shall be as detailed in Ordinance MC-783 and per Exhibit “A”. No fencing, planting materials or obstructions that cause a sight obstruction of any kind will be permitted to be over 30 inches high, as measured from the flow line of the curb and gutter, in the front or side yard setback area - or in the sight distances areas as detailed in Exhibit “A1.
7 Plantings or signs in median islands must be checked for visual obstructions resulting from temporary alignment of the proposed improvements.
B Traffic Reports
As a part of the review process, the Environmental Review Committee or the Development Review Committee may identify concerns for the need for a traffic study and report. The Traffic Engineer under the authority of the Director of Public Works/City Engineer will make the final decision on the need for a traffic study or report as a condition of the development. These reports are made necessary by the size, configuration or impact of the proposed development.
Listed below are some basic criteria that may be used to assess the probability of having to complete a traffic report as a part of the project review process. It is not a complete or exhaustive list, but is intended to give guidelines as to when such an extensive report is to be prepared and to assist in the development of such a report by indicating the necessary components of the submitted report.
1 General Criteria
a Any project that adds more than 10% additional trips to the adjacent street system at full build out of the project. No allowance will be made for attraction or capture trip ends.
b Any project that generates more than 500 daily trip ends residential, or 1000 trip ends commercial or industrial, as determined bv the average trip rate as contained in the ITE Trip Generation Report.
c Any project that has the potential to degrade the existing street system or signal system to level of service D or lower during peak hour using operational analysis on any selected movement.
d Any project that generates more than 40% of its total traffic in the form of truck traffic.
e Any project that intensifies the usage of the site above the level currently allowed by zoning codes and requires a CUP, zone change or other discretionary permit.
f Any project that has a peak hour volume exceeding 75 trip ends.
2 Report Contents
Traffic Reports submitted for review and approval must contain the following items as a minimum:
a Total number of trips anticipated from the project based on the average trip generation rates as contained in the ITE Trip Generation Report for total build out of the project.
b Project traffic on the adjacent street system projected for five (5) years or to project build out, whichever is longer.
c Traffic projections on the adjacent street system for I both the project and “normal” background growth (5.% per year or as detailed in the General Plan) with consideration to approved projects for the specific area.
d Traffic projections shall include the additional impact of undeveloped land within 1,500 feet or as detailed in the General Plan.
e Impacts on adjacent intersections using an intersection capacity analysis.
f Trip distribution and assignment analysis with justification on the percentages for directional travel and/or turning movements.
g Analysis of pedestrian movement and/or generation and need for additional crossings or facilities.
h Parking requirements and information on peak loading of the transportation network if applicable.
i Existing and proposed signal phases, progression and/or coordination.
j Traffic counts. Traffic counts must be current (within one year) and must be machine counts of suitable length for analysis of the project.
k Recommendations and conclusions of the report with the proposed mitigation measures listed in priority order.
l Signal warrants shall. be established using existing traffic at the intersection plus the project traffic, using a minimum of an 8-hour actual count at the intersection.