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TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: DIRECTOR OF PUBLIC WORKS
DATE: APRIL 15, 2003
SUBJECT: TRAFFIC CALMING – RIDGEGATE UPDATE
Staff Coordinator: Nicole Jules, Sr. Engineer
1. Receive and File Ridgegate Traffic Calming Status Report.
The Ridgegate Traffic Calming issue has been presented to the Traffic Committee on several occasions. Table 1 is a chronological list of meeting dates and the subsequent actions. The main issue revolves around speeding vehicles and cut-through traffic observed on Ridgegate Drive. Although not technically classified as a residential street, thus making it ineligible for the City’s Neighborhood Traffic Calming Program, for the sake of addressing the communities concerns, Ridgegate is considered a candidate for traffic calming measures.
TABLE 1 – Summary of Traffic Committee Meetings
Table 2 identifies a summary of volumes, speed zone studies and traffic collision data collected to date.
TABLE 2 – VOLUME, SPEED, COLLISION DATA FOR RIDGEGATE DRIVE
The Traffic Committee has recognized a need to implement various forms of traffic control measures in the attempt to reduce speed on Ridgegate Drive. The HOA has continuously requested traffic calming devices to curtail what is perceived to be a dangerous situation. The HOA feels Ridgegate Drive should be treated as a residential street and that volumes and speed studies support the implementation of the Neighborhood Traffic Calming Program. The HOA also feel that speed humps should be installed. The HOA has also suggested that Ridgegate Drive be considered for a cul-de-sac or turned into a private street / gated community.
The HOA, by letter to the City Council dated February 20, 2003, feels that none of the actions listed in Table 1 have reduced the high speeds, cut through traffic and volumes on Ridgegate Drive and that something else needs to be done. The HOA raised the concern that one resident could have the pavement markers removed without the consent of the HOA. It should be noted that at the TC meeting which authorized the placement of the pavement markers stated that they would be removed even if only one person complained.
Summary of Actions and Implementation:
1. An edge line has been striped on Ridgegate Drive from Hawthorne
Blvd to Highridge Road.
It is the consultant Traffic Engineer’s opinion that Ridgegate is not a candidate for "speed humps" and there is not a defined traffic problem based upon the following:
Street geometrics designed to carry higher volumes at above prima facie speed.
Recognized street classification (collector) for over 15 years.
Minimal to no traffic accidents that relate to speed or volume of traffic.
Speed zone studies, which have been consistent over an eight-year period.
Critical speed at 37 mph.
Pace speed at 26 to 39 mph.
Percent in pace 63% to 80%.
However, it is recommended that the RPM’s (that were removed due to noise complaint) be replaced at a location approved by the HOA’s, that a speed and volume study be conducted within 60 days after the RPM’s are reinstalled, and that the Traffic Committee and Staff continue to work with the Ridgegate Community on traffic calming measures.
1. Consider plans for separating Ridgegate with a cul-de-sac.
Dean E. Allison