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HomeMy WebLinkAboutMinutes - May 2, 2023 SSShirtsleeve Session Meeting Traffic Calming May 2, 2023 The City of Lodi Public Works 1 Overview •Traffic Calming Devices •Traffic Calming in Lodi •What do other agencies do? •Costs 2 Traffic Calming Devices 1.Non-Physical Devices a)Radar Trailer b)Radar Speed Board c)Signage d)Street Striping 3 Radar Trailer 4 Radar Speed Board 5 Signage 6 Street Striping 7 Traffic Calming Devices 2.Narrowing Devices a)Bulbouts b)Entry Feature c)Raised Median 8 Bulbouts 9 Entry Feature 10 Raised Median 11 Traffic Calming Devices 3.Horizontal Deflection Devices a)Roundabout b)Chicane 12 Roundabout 13 Chicane 14 Traffic Calming Devices 4.Vertical Deflection Devices a)Speed Bump b)Speed Cushions c)Speed Table 15 Speed Bump 16 Speed Cushions 17 Speed Table 18 Traffic Calming in Lodi 19 Methodology •Radar Trailer •Police Enforcement Traffic Calming In Lodi 20 •Radar Trailer Traffic Calming In Lodi 21 •Police Enforcement Traffic Calming In Lodi 22 •In-Street Crossing Sign (Tokay St at Virginia Ave) Traffic Calming In Lodi 23 •LED Pedestrian Crossing Sign (Elm St at Loma Dr) Traffic Calming In Lodi 24 •Rectangle Rapid Flashing Beacons (RRFBs) (Lockeford St at Calaveras St) Traffic Calming In Lodi 25 •Street Striping (Holly Dr east of Ham Ln) Traffic Calming In Lodi 26 •Bulbouts (Wyndham Way at Ivory Lane) Traffic Calming In Lodi •Entry Feature (Bridgetowne Dr at Turner Rd) 27 Traffic Calming In Lodi 28 •Raised Median (Port Chelsea Cir at Ham Ln) Traffic Calming In Lodi •Roundabout (Lodi Ave at Rose Gate Dr) 29 Traffic Calming In Lodi •Modified Chicane (Elm St between School St and Sacramento St) 30 Speed Bump –Pros and Cons Pros •Reduce speed by 3 –5 MPH in average •No loss of on-street parking Cons •Emergency response time •Divert speeders •Emergency vehicles damage •Increase noise level •Speed increase •Air pollution •Decrease property values •Severe pain for people with disabilities •Back injuries/backpain 31 Existing Speed Bumps -City of Sacramento 32 Existing Speed Bumps -City of Sacramento 33 Existing Speed Bumps -City of Stockton 34 What Do Other Agencies Do? AGENCY TRAFFIC CALMING METHODOLOGY City of Galt City of Ripon City of Dublin City of Folsom City of Lincoln City of Rocklin City of Fairfield City of Vacaville Foster City Police Enforcement / Radar Trailer *City of Tracy City of Lathrop City of Modesto City of Elk Grove City of Sacramento Sacramento County Step 1 –Police Enforcement / Radar Trailer / Striping / Signage Step 2 –Horizontal and Vertical Deflection (based on screening criteria) City of Stockton Horizontal and Vertical Deflection (based on screening criteria) San Joaquin County Vertical Deflection and Radar Trailer 35 *No speed bump installation for past 10 years Agencies Oppose Speed Bump •City of Roseville –discontinued the program because of too many issues and resident complaints –Program to remove existing speed humps •City of Dublin •City of Fairfield •City of Vacaville •City of Foster City 36 Agencies Oppose Speed Bump •Based on other agencies experience •Cause drivers to lose control resulting in widespread damage to personal property •Public agencies may be liable for the personal injuries •Problem with their overall safety and effectiveness 37 Screening Criteria For Agencies Adopted Traffic Calming Policy 2-Lane Local Residential Street Posted Speed Limit = 25MPH (City of Sacramento and Stockton ≤ 30MPH) Street Segment ≥ 750 feet Average Daily Traffic (ADT) –500 and 2,000 Cannot affect Emergency or Transit Services 85th Percentile Speed –10 MPH ≥ speed limit (Tracy and Lathrop –7MPH ≥;City of Sacramento and Stockton –5MPH ≥) Approval from Fire Department and Transit 38 Construction Budget & Staffing •City of Sacramento -*$350,000 per year Engineering –5.5 staff, Construction –6 staff $5,000 to $7,000 each (based on street width, ~ 80 set total) City’s Street Department for installation •City of Stockton -*$280,000 per year Engineering -3 staff $3,500 each (~ 80 sets total) Advertise Bids for installation * 2022 Construction cost only -not include staffing salary and benefit 39 Construction Budget & Staffing •Sacramento County -*$126,000 per year Engineering –3.5 staff $7,000 each Advertise bids for installation •San Joaquin County -varies by district and by year Engineering -3 staff $7,000 each Advertise Bids for installation * 2022 Construction cost only -not include staffing salary and benefit 40 Construction Budget & Staffing •City of Lathrop -*$75,000 per year Engineering –3 staff $8,000 each Advertise Bids for installation •City of Elk Grove -*$50,000 per year Engineering –2 staff $9,000 each City’s On-Call Contractor for installation * 2022 Construction cost only -not include staffing salary and benefit 41 Construction Budget & Staffing •City of Modesto -TBD per year Construction –100% residents responsibility (prior Dec 2021) Adopt new program guidelines December 2021 Not yet implement the program 42 Maintenance •City of Sacramento Street pavement projects –remove and reinstall speed cushions Speed cushion removal –$5,000 each cushion 43 Videos https://kmph.com/news/local/sparks-fly-when-drivers-fail-to-see- speed-bumps-in-northeast-fresno-neighborhood 44 Questions 45