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HomeMy WebLinkAboutAgenda Item - 2001-05-08 - Number 3.1 - 3. 1 CITY OF LAKE OSWEGO 05/08/01 AGENDA REPORT SUMMARY MEETING DATE: May 8, 2001 SUBJECT: Speed Bump Rating Chart Explanation RECOMMENDED MOTION: For information only. ESTIMATED FISCAL ATTACHMENTS: NOTICED (Date): IMPACT: • Schmitz memo of 4 May 2001 STAFF COST: $ Ordinance no.: BUDGETED: Y N Resolution no.: FUNDING SOURCE: Previous Council consideration: DEPARTMENT DIRECTOR CITY NAGER 1 1147 bi signoff/date signoff/da 1 K:\Council\Report Cover.doc `,A.,OF IAHE Osk,FCO it CITY MANAGER'S OFFICE MEMORANDUM OREGO$ TO: Judie Hammerstad, Mayor Members of the City Council FROM: Douglas J. Schmitz, City Manager SUBJECT: Neighborhood Traffic Management Program (NTMP) DATE: 4 May 2001 In the morning agenda review session on 1 May, the Council requested a brief presentation on the evaluation criteria and process for determining whether or not speed bumps be installed. Attached is a memorandum from the Engineering Department, listing the criteria utilized for project qualification. Also attached is the pertinent section of the City Code and an actual application/evaluation sheet for the speed bumps on Knaus Road that the Council is considering. Attachment 3 Memorandum To: Douglas Schmitz, City Manager From: Mark Schoening, City Engineer Subject: Neighborhood Traffic Management Program (NTMP) Project Qualifying Process Prepared By: Kathy J. Marcott and Tom Tushner Date: May 2, 2001 This memorandum will attempt to clarify the scoring process used in evaluating applications for traffic calming devices as outlined in LOC 32.14.034, Review and Decision, sections (la-f)and (2). Preliminary data about each NTMP application including volume of traffic,physical characteristics of the subject street, speed and accident information is gathered,then reviewed and points are assigned in six areas as follows: a. Traffic Volume This score is determined by taking the average weekday traffic for 48 hours on the segment of the project street having the highest volume and dividing it by 200 to determine the point total. Maximum score for this section is 30 points. For example, the total volume on the section of Knaus Road between Boones Ferry and Alto Park Road for two days was 2914 divided by 200 = 14.57 or b. Speed Percent of vehicles traveling at least 3 miles per hour over the speed limit taken on the same segment of the street used to determine traffic volume. Maximum score for this section is 30 points. 435 vehicles were traveling at least 3 miles over the speed limit on Knaus Road. This number was divided by the highest volume for one day (12-15-00) which was 1504 vehicles. 435 divided by 1504 is 29 percent divided by 3 = 9.64 or rounded off..................................................................10 points. c. Accidents Five points shall be assigned to project streets for each correctable accident reported in the last three consecutive years from the date of the application. Non-correctable accidents (those that would not be prevented by a traffic management device) shall not be counted. Maximum point score is 15. There were no accidents reported by LOPD for the years 1997, 1998, and 1999 on this section of Knaus Road. The City received their application on November 8, 1999.....................................................................0 points. 5 Neighborhood Traffic Management Program Program Qualifying Process May 2, 2001 Page 2 d. Schools Five points shall be assigned for each public or private school bordering on the subject street. And five points shall be assigned to project streets which are located within a walking area surrounding a school as designated by a school district if the walking area does not have sidewalks or pathways. There were no public or private schools on the street nor were there walking areas surrounding a school along the entire studied section of Knaus Road from Boones Ferry to Goodall Road............ 0 points e. Other Pedestrian Areas Five points shall be assigned for each pedestrian oriented facility or group of facilities, if adjacent to one another. These could include elderly housing, parks, the Library, Adult Community Center, neighborhood pool, swim park. The maximum point total for this section is ten points. No pedestrian oriented facilities as defined by the code...... 0 points. f. Street without sidewalks or pathways A maximum of five points shall be assigned if the project street is not bordered by a sidewalk or pathway. Knaus Road has no sidewalks or pathways in this section so we assigned the street five points......... 5 points Total score for Knaus Road (Boones Ferry to Alto Park Road) 30 points LOC 32.14.034 (2) Applications receiving less than thirty points will not be considered for further action. However, in the Knaus Road example cited above, the segment of street between Boones Ferry and Alto Park Road received 30 points and went on to a public hearing before the Transportation Advisory Board (TAB). The TAB approved the installation of two collector speed bumps on Knaus road at their hearing held on March 8, 2000. Note: Attached to this document is LOC 32.14.034 Sections 1 and 2. 6 LAKE OSWEGO UNIFORM TRAFFIC CODE § 32.14.033 32.14.039 shall not be reconsidered or accident information, etc. The City Manager resubmitted for a period of three years from the shall review this information and assign points to date of the original application. An application each and every application as follows: for a particular traffic management device that a. Traffic Volume: Average Daily was rejected because the requested device did Weekday Traffic (ADWT) on the segment of the not comply with engineering standards on the project street having the highest volume. ADWT particular street shall not be reconsidered or shall be determined by conducting an resubmitted for the same device on the same uninterrupted 48 hour traffic count, which shall street. Exception: A reapplication may be filed be divided by 200 to determine the point total. and considered prior to the expiration of the The maximum point score pursuant to this three year period or otherwise if the applicants section is 30 points. submit evidence that demonstrates to the b. Speed: Percent of vehicles travelling satisfaction of the City Manager that a at least 3 miles per hour over the speed limit on substantial change in circumstances has occurred the same segment of the project street used to since the previous consideration of the project determine traffic volume pursuant to subsection that has had a material negative effect on the (a) of this section, divided by 3. The maximum traffic volume, speed or safety on the street or point score pursuant to this section is 30 points. segment of street for which the project was c. Accidents: Five points shall be previously proposed, or that change the assigned to project streets for each correctable engineering analysis of a particular device. accident reported in the last three consecutive Examples of such evidence include, but are not years from the date of the application. limited to: Non-correctable accidents shall not be counted. a. The siting or expansion of a high The maximum point score pursuant to this traffic use; section is 15 points. b. The construction or modification of d. Schools: Five points shall be a road improvement that has substantially assigned for each public or private school rerouted traffic onto the street; bordering on the subject street. Five points shall c. The construction of a school or other be assigned to project streets which are located pedestrian oriented facility abutting the subject within a walking area surrounding a school as street or segment of street; designated by a school district if the walking d. An increase of two or more area does not have sidewalks or pathways. correctable traffic accidents on the subject street e. Other Pedestrian Areas: Five points or segment of street since the original shall be assigned for each pedestrian oriented application; or facility or group of facilities, if adjacent to one e. A change in the street configuration another. "Pedestrian oriented facilities" include or engineering standards that would change the but are not limited to elderly housing,parks, the engineering analysis regarding an application for Library,Adult Community Center,neighborhood a particular device. pool, and swim parks. The maximum point (Ord. No. 2045, Enacted, 08/10/93; Ord. No. 2109, score pursuant to this section is ten points. Amended, 12/20/94; Ord. No. 2137, Amended, 09/17/96) f. Street Without Sidewalks or Pathways. A maximum of five points shall be 32.14.034. Review and Decision. assigned if the project street is not bordered by 1. The City Manager shall gather a sidewalk or a pathway. preliminary data about each NTMP application, 2. 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