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5.3. SR 10-12-1998ity of MEMORANDUM Item #5.3. TO: FROM: DATE: SUBJECT: Mayor & City Council Pat Klaers, City Admini~tor October 12, 1998 Stop Sign Study: Dodge Avenue/189m Street Attached for your information is a memo from the city engineer regarding a stop sign study at 189th Avenue and Dodge Street. This is the location of the entrance of the Country Inn and Suites project onto Dodge Avenue. The background material from Terry's report is not included, but is available if the Council desires to see this material. The recommendation from the city engineer is that no stop signs on Dodge Avenue are warranted. \\elkriver\sys\shrdoc\council\sssdodge.doc 13065 Orono Parkway · P.O. Box 490 · Elk River, MN 55330 · TDD & Phone: (612) 441-7420 · Fax: (612) 441-7425 R. Green Company CONSULTING ENGINEERS October 2, 1998 File: 804920J-0325 CONSULTING ENGINEERS Formerly MSA Consulting Engineers Mr. Pat Klaers City Administrator City of Elk River 13065 Orono Parkway Elk River, MN 55330 RE: 189TM AVENUE/DODGE STREET INTERSECTION Dear Mr. Klaers: When the City Council considered the Country Inn and Suites proposals, they also authorized an all-way stop sign warrant study for the intersection of 189th Avenue and Dodge Street. As you are aware, the intersection is currently a "T" intersection, but the fourth leg will become the driveway to the Country Inn and Suites. 189th Avenue is currently stop-controlled with no stop sign on Dodge Street. We performed traffic counts for this analysis from Tuesday, September 1, 1998 to Thursday, September 3, 1998. Results of these traffic counts are attached. We have observed very little pedestrian traffic at this intersection, so pedestrian counts were not performed. Warrants for multi-way stop signs are found in the Minnesota Manual of Uniform Traffic Control Devices (MMUTCD), and are as follows: The "Multi-way Stop" installation is useful as a safety measure at some locations. It should ordinarily be used only where the volume of traffic on the intersecting roads is approximately equaL A traffic control signal is more satisfactory for an intersection with a heavy volume of traffic. Any of the following conditions may warrant a multi-way STOP sign installation (sec 2B-4): Where traffic signals are warranted and urgently needed, the multi-way stop is an interim measure that can be installed quickly to control traffic while arrangements are being made for the signal installation. An accident problem, as indicated by five or more reported accidents of a type susceptible of correction by a multi-way stop installation in a 12-month period. Such accidents include right and left turn collisions as well as right-angle collisions. O:\PROJ\804920j\0325\920-1807.sept.doc 1326 Energy Park Drive · St. Paul, MN 55108 · 612/644-4389 fax 612/644-9446 toll free 888/368-4389 Mr. Pat Klaers October 2, 1998 Page 2 3. Minimum traffic volumes: The total vehicular volume entering the intersection from afl approaches must average at least 500 vehicles per hour for any 8 hours of an average day, and The combined vehicular and pedestrian volume from the minor street or highway must average at least 200 units per hour for the same 8 hours, with an average delay to minor street vehicular traffic of at least 30 seconds per vehicle during the maximum hour, but When the 85-percentile approach speed of the major street traffic exceeds 40 miles per hour, the minimum vehicular volume warrant is 70 percent of the above requirements. Analysis of each of these warrants is as follows: A signal is not warranted or urgently needed at this intersection, so this warrant is not met. On September 2, 1998, Jori Anderson at Mn/DOT Office of Traffic Engineering responded to our request to send us a listing of all reported accidents at this intersection for the last three years. The summaries are found on the attached pages. No accidents have occurred at this intersection in the past three years. Therefore, this warrant is not met. Traffic counters were set up on all approaches of this intersection from Tuesday, September 1, 1998 to Thursday, September 3, 1998. The results are included on the attached pages. Presently, there are no hours where the total approach volume of the intersection is at least 500 vehicles. The peak approach volume hour was 5:00 p.m. - 6:00 p.m., and there were 340 vehicles entering the intersection. Using the Trip Generation manual, and assuming 78 occupied rooms in a motel, the average weekday traffic would be 752 vehicles per day (Ln(T) = 1.065Ln(X) + 1.983; T- number of trip ends, X = number of occupied rooms; p.550 of manual). A conservatively high assumption for the peak hour is 10% of the ADT. With this assumption, and assuming that % of the vehicles are leaving the hotel at this hour, this peak volume would be 75~2 = 38 vehicles. Adding this volume to the peak hour volume, there would be 378 vehicles during the peak hour. There still would be 0 hours when the approach traffic reaches 500 vehicles. There is no significant pedestrian volume at this intersection to affect this warrant. This warrant is not met. Howard R, Green Company O:\PROJ\804920j\O325\920-1807.sept.doc CONSULTING ENGINEERS Mr. Pat Klaers October 2, 1998 Page 3 bo Even with the addition of the traffic out of the motel, this warrant be met for 0 hours. Co The speed limit on Dodge Street is 30 mph, so 100% of the warrants must be met. Based on the above information, none of the warrants for multi-way stop control are met, and it is recommended that the intersection of Dodge Street and 189th Avenue remain a minor street stop controlled intersection, both before the motel construction and after the motel construction. If you have any questions or would like further work done on this issue, please call. Sincerely, Howard R. Green Company Terry J. Maurer, P.E. TJM/st Howard R, Green Company O:\PROJ\804920j\0325\920-1807.sept.doc CONSULTING ENGINEERS ', oO~]jooo 90 oOo oO AVE N.UJ.