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Home My WebLink About5. OLD BUSINESS 10/20/2009 Mount Prospect Mount Prospect Public Works Department INTEROFFICE MEMORANDUM TO: VILLAGE MANAGER MICHAEL E. JANONIS "'&b · J.-l~ I 01-1 eft FROM: PROJECT ENGINEER DATE: SEPTEMBER 30, 2009 SUBJECT: NEIGHBORHOOD TRAFFIC STUDY FINAL REPORT FOR ZONES 9,14,15 & 17 The Engineering Division in collaboration with KLOA Inc., the Village's traffic engineering consul nt, have recently completed post-studies at the one year mark after implementing the approved intersection control and speed limit plans in four neighborhoods. These neighborhoods, Zones 9, 14, 15 & 17, represent completion of the Neighborhood Traffic Study for a total of seven of the eighteen zones as part of this Village-wide program. This report highlights the post-studies for these four neighborhoods and provides final intersection control and speed limit recommendations. Zone 9 Zone 9 is bounded by Rand Road to the north and east, Central Road to the south and Route 83 to the west. The neighborhood has 33 intersections and approximately 6.9 miles of streets under the Village's jurisdiction. Busse Park, Gregory Park and Emerson Park are within the neighborhood. The first post-study was performed approximately six months after implementing the sign changes. Each property in the neighborhood was mailed a letter highlighting the results of the study. A web page on the Village web site was also created with additional information. The second post-study, performed one year after implementing the sign changes, focused on those locations that were deemed to require additional evaluation based on the results of the first post-study. Therefore, the second post-study involved gathering vehicular volume and speed data at only 13 locations compared to 30 locations from the first post-study. However, similar to the first post-study, the Village also monitored pedestrian activity at 1 intersection and reviewed accident records at all 33 intersections in the neighborhood. Below is a summary of the results: First Post-Study Daily Volume (comparing data before sign changes to data from first post-study)- Stayed consistent or decreased at 20 locations (67%) Increased by 15% or more at 10 locations (33%) Average Speed (comparing data before sign changes to data from first post-study)- Stayed consistent or decreased at 27 locations (90%) Increased by 5 mph or more at 3 locations (10%) Accident Rate (# accidents in the neighborhood) - 3-year period before the sign changes: 19 6-month period after the sign changes: 1 68% reduction page 1 of7 Neighborhood Traffic Study - Zones 9, 14, 15 & 17 September 30, 2009 Second Post-Study Daily Volume (comparing data before sign changes to data from second post-study)- Stayed consistent or decreased at 11 locations (85%) Increased by 15% or more at 2 locations (15%) Average Speed (comparing data before sign changes to data from second post-study)- Stayed consistent or decreased at 12 locations (92%) Increased by 5 mph or more at I location (8%) Accident Rate (# accidents in the neighborhood)- 3-year period before the sign changes: 19 I-year period after the sign changes: 6 6% reduction Neighborhood Access along Rand Road In addition to implementing intersection traffic control and speed limit modifications, access changes were made at the four neighborhood streets that intersect Rand Road. In summary, Highland Street is now a two-way street and permits full turning movements except for the through movement between Highland Street and Highland Avenue. Isabella A venue, Louis Street and Henry Street now have similar restrictions: no right turns into the neighborhood and no left turns out of the neighborhood during both the morning and afternoon peak travel times. And Louis Street continues to prohibit left turns into the neighborhood at all times. As a result of these changes, traffic in the neighborhood has been redistributed as residents now have alternative and more direct ways to access Rand Road. Highland Street and Louis Street now have greater access resulting in an increase in traffic while other intersecting streets such as Henry Street have experienced a reduction in traffic. And just as important, the other surrounding neighborhood streets have not experienced a noticeable change in traffic as a result of these changes. In addition to traffic volumes, traffic speeds along these four neighborhood streets that intersect Rand Road have not significantly changed and there has actually been a reduction in the accident rate. For a three year period prior to the changes, Rand Road at the four intersecting streets (Highland Street, Isabella Avenue, Louis Street & Henry Street) were experiencing on average 4.3 accidents per year. During the past year, the four intersections experienced only 2 accidents. Evaluation The results of the post-studies indicate that the operating characteristics within the neighborhood have generally improved since implementation of the intersection traffic control and speed limit modifications. It is recognized, though, that access along Rand Road has been enhanced, specifically at Highland Street and at Louis Street. As such, traffic in the neighborhood has been redistributed as residents now have alternative and more direct ways to access Rand Road. While some streets have experienced an increase in traffic volume and/or speed, the number of such locations has been limited even with the increased access along Rand Road. Only Highland Street and Louis Street have experienced a noticeable traffic volume increase. Overall, traffic volumes and speeds are within acceptable ranges and the accident rate has slightly decreased. Recommendation Based on the two post-studies performed by the Engineering Division and KLOA Inc., there are no recommended adjustments to the intersection control or speed limits in the neighborhood nor to the access regulations along Rand Road. page 2 of7 Neighborhood Traffic Study - Zones 9, 14, 15 & 17 September 30, 2009 Zone 14 Zone 14 is bounded by Lincoln Street to the north, Route 83 to the east, Golf Road to the south and Busse Road to the west. The neighborhood has 53 intersections and approximately IIA miles of streets under the Village's jurisdiction. Mount Prospect Golf Course and Sunset Park are within the neighborhood. The first post-study was performed approximately six months after implementing the sign changes. Each property in the neighborhood was mailed a letter highlighting the results of the study. A web page on the Village web site was also created with additional information. The second post-study, performed one year after implementing the sign changes, focused on those locations that were deemed to require additional evaluation based on the results of the first post-study. Therefore, the second post-study involved gathering vehicular volume and speed data at only 16 locations compared to 54 locations from the first post-study. However, similar to the first post-study, the Village also monitored pedestrian activity at 4 intersections and reviewed accident records at all 53 intersections in the neighborhood. Below is a summary of the results: First Post-Study Daily Volume (comparing data before sign changes to data from first post-study)- Stayed consistent or decreased at 38 locations (70%) Increased by 10% or more at 16 locations (30%) Average Speed (comparing data before sign changes to data from first post-study)- Stayed consistent or decreased at 54 locations (100%) Increased by 5 mph or more at 0 locations (0%) Accident Rate (# accidents in the neighborhood) - 3-year period before the sign changes: 10 6-month period after the sign changes: 2 20% increase Second Post-Study Daily Volume (comparing data before sign changes to data from second post-study)- Stayed consistent or decreased at 5 locations (31 %) Increased by 10% or more at II locations (69%) Average Speed (comparing data before sign changes to data from second post-study)- Stayed consistent or decreased at 16 locations (100%) Increased by 5 mph or more at 0 locations (0%) Accident Rate (# accidents in the neighborhood) - 3-year period before the sign changes: 10 I-year period after the sign changes: 4 20% increase Evaluation The results of the post-studies indicate that the operating characteristics within the neighborhood have generally improved since implementation of the intersection traffic control and speed limit modifications. While some streets have experienced an increase in traffic volume, the increase has generally been within the expected daily variations and/or the volumes have been in the range typically found on collector and local streets. Further, average speeds have remained within acceptable ranges and the accident rate continues to be low. The eleven locations that have experienced a 10% or more increase in traffic volume continue to have daily volumes typical for the street classification. Eight locations are on local streets that only have daily volumes between 130 and 400 vehicles while three locations are on collector streets that have daily volumes less than 1200 vehicles. Average speeds continue to be below the neighborhood speed limit and page 3 of? Neighborhood Traffic Study - Zones 9, 14, 15 & 17 September 30, 2009 no locations experienced a significant average speed increase. And with respect to the accident rate, of the four accidents that occurred in the one-year period, no one intersection presented itself as problematic. Recommendation Based on the two post-studies performed by the Engineering Division and KLOA Inc., there are no recommended adjustments to the intersection control or speed limits in the neighborhood. Zone 15 Zone IS is bounded by Northwest Highway to the north, Mount Prospect Road to the east, Golf Road to the south and Route 83 to the west. The neighborhood has 70 intersections and approximately 14.6 miles of streets under the Village's jurisdiction. Lions Park Elementary School, Lions Memorial Park, Sunrise Park and Countryside Park are within the neighborhood. The first post-study was performed approximately six months after implementing the sign changes. Each property in the neighborhood was mailed a letter highlighting the results of the study. A web page on the Village web site was also created with additional information. The second post-study, performed one year after implementing the sign changes, focused on those locations that were deemed to require additional evaluation based on the results of the first post-study. Therefore, the second post-study involved gathering vehicular volume and speed data at only IS locations compared to 57 locations from the first post-study. However, similar to the first post-study, the Village also monitored pedestrian activity at 6 intersections and reviewed accident records at all 70 intersections in the neighborhood. Below is a summary of the results: First Post-Study Daily Volume (comparing data before sign changes to data from first post-study)- Stayed consistent or decreased at 44 locations (77%) Increased by 10% or more at 13 locations (23%) Average Speed (comparing data before sign changes to data from first post-study)- Stayed consistent or decreased at 56 locations (98%) Increased by 5 mph or more at 1 location (2%) Accident Rate (# accidents in the neighborhood) - 3-year period before the sign changes: 44 6-month period after the sign changes: 3 59% reduction Second Post-Study Daily Volume (comparing data before sign changes to data from second post-study)- Stayed consistent or decreased at 13 locations (87%) Increased by 10% or more at 2 locations (13%) Average Speed (comparing data before sign changes to data from second post-study)- Stayed consistent or decreased at 14 locations (93%) Increased by 5 mph or more at 1 location (7%) Accident Rate (# accidents in the neighborhood)- 3-year period before the sign changes: 44 I-year period after the sign changes: 11 25% reduction Evaluation The results of the post-studies indicate that the operating characteristics within the neighborhood have generally improved since implementation of the intersection traffic control and speed limit modifications. page 4 of7 Neighborhood Traffic Study - Zones 9, 14, 15 & 17 September 30, 2009 It appears the sign changes have improved the flow of traffic within the neighborhood and enhanced safety. Overall, traffic volumes and speeds are within acceptable ranges and the accident rate has decreased. While some streets have experienced an increase in traffic volume and/or speed, the number of such locations has been very limited. The two locations that have experienced a 10% or more increase in traffic volume are near the elementary school. The original data at these two locations were collected during the summer months while the post- study data was collected during the spring and fall. Therefore, the increase in traffic volume can be attributed to school traffic. With respect to traffic speed, only one location experienced an average speed increase of 5 mph and it still is below the posted speed limit. And with respect to the accident rate, of the eleven accidents that occurred in the one-year period, ten accidents occurred along collector streets where there are greater traffic volumes compared to local streets. No one intersection presented itself as problematic. Recommendation Based on the two post-studies performed by the Engineering Division and KLOA Inc., we are recommending two changes to the intersection control that affect the Village Code but not actual sign changes: 1. Lincoln Street & Main Street - Before the study began this intersection was controlled with four stop signs. As part of the original traffic study, KLOA Inc. recommended that the stop signs on Lincoln Street (collector street) be removed making it a two-way stop controlled intersection. The recommendation was approved by the Village Board of Trustees. Shortly after removing the stop signs on Lincoln Street the Village received many calls from concerned residents. Vehicles traveling east on Lincoln Street from Route 83 were doing so at speeds exceeding the neighborhood speed limit. The stop signs had served as a control to transition motorists into a neighborhood environment. Without the stop signs, motorists were continuing their highway speed into the neighborhood. The Village Manager's Office directed Staff to reinstall the stop signs on Lincoln Street and the intersection today is controlled with four stop signs. The intersection has operated safely over the last year (no accidents) and is recommended to remain a four-way stop. The Village Code, however, no longer recognizes Lincoln Street as having stop signs at Main Street. Recommendation: Amend the Village Code to add stop signs on eastbound and westbound Lincoln Street at Main Street (Section 18.2004A). 2. Milburn Avenue & Emerson Street - Before the study began this T-intersection was controlled with a single stop sign on Milburn Avenue. As part of the original traffic study, KLOA Inc. recommended no change to the intersection control at this intersection and the Village Board of Trustees approved this recommendation. Today, the intersection continues to operate safely with only a stop sign on Milburn Avenue. The Village Code, however, reflects both a stop sign and a yield sign on Milburn Avenue at Emerson Street. Apparently, many years ago the intersection operated with a yield sign on Milburn A venue but when it was replaced with a stop sign the Village Code was not amended. Recommendation: Amend the Village Code to remove the yield sign on eastbound Milburn Avenue at Emerson Street (Section 18.2004B). The Engineering Division has no other recommended adjustments to the intersection control or speed limits in the neighborhood. page 5 of7 Neighborhood Traffic Study - Zones 9, 14, 15 & 17 September 30, 2009 Zone 17 Zone 17 is bounded by Golf Road to the north, Route 83 to the east, Dempster Street to the south and Busse Road to the west. The neighborhood has 41 intersections and approximately 8.3 miles of streets under the Village's jurisdiction. Robert Frost Elementary School and Kopp Park are within the neighborhood. The first post-study was performed approximately six months after implementing the sign changes. Each property in the neighborhood was mailed a letter highlighting the results of the study. A web page on the Village web site was also created with additional information. The second post-study, performed one year after implementing the sign changes, focused on those locations that were deemed to require additional evaluation based on the results of the first post-study. Therefore, the second post-study involved gathering vehicular volume and speed data at only 11 locations compared to 43 locations from the first post-study. However, similar to the first post-study, the Village also monitored pedestrian activity at 5 intersections and reviewed accident records at all 41 intersections in the neighborhood. Below is a summary of the results: First Post-Study Daily Volume (comparing data before sign changes to data from first post-study)- Stayed consistent or decreased at 37 locations (86%) Increased by 10% or more at 6 locations (14%) Average Speed (comparing data before sign changes to data from first post-study)- Stayed consistent or decreased at 42 locations (98%) Increased by 5 mph or more at 1 location (2%) Accident Rate (# accidents in the neighborhood) - 3-year period before the sign changes: 12 6-month period after the sign changes: 1 50% reduction Second Post-Study Daily Volume (comparing data before sign changes to data from second post-study)- Stayed consistent or decreased at 11 locations (100%) Increased by 10% or more at 0 locations (0%) Average Speed (comparing data before sign changes to data from second post-study) - Stayed consistent or decreased at 10 locations (91 %) Increased by 5 mph or more at 1 location (9%) Accident Rate (# accidents in the neighborhood) - 3-year period before the sign changes: 12 I-year period after the sign changes: 1 75% reduction Evaluation The results of the post-studies indicate that the operating characteristics within the neighborhood have generally improved since implementation of the intersection traffic control and speed limit modifications. It appears the sign changes have improved the flow of traffic within the neighborhood and enhanced safety. Overall, traffic volumes and speeds are within acceptable ranges and the accident rate has decreased. While some streets have experienced an increase in traffic volume and/or speed, the number of such locations has been very limited. None of the eleven locations as part of the second post-study have experienced a 10% or more increase in traffic volume. Average speeds continue to be below the neighborhood speed limit and only one location has experienced an average speed increase of 5 mph. That street, Chestnut Drive, has experienced an average speed of 21 mph which is still below the speed limit as well as average speeds on many other page 6 of? Neighborhood Traffic Study - Zones 9, 14, 15 & 17 September 30, 2009 residential streets. And with respect to the accident rate, only one accident occurred in the one-year period. This is lower than the four accidents the neighborhood averaged during the three years prior to the sign changes. Recommendation Based on the two post-studies performed by the Engineering Division and KLOA Inc., there are no recommended adjustments to the intersection control or speed limits in the neighborhood. Resident Notification A couple of weeks prior to the upcoming Village Board Meeting residents within the four neighborhoods were notified of the one-year post-studies. The notices summarized the results and directed them to the Village web-site for additional information. They also provided notice of the October 6th Village Board Meeting where the results and final recommendations would be presented by the Engineering Division. Residents were invited to attend and participate in the meeting. Decisions made by the Village Board of Trustees at this upcoming Village Board Meeting will serve as closure to the Neighborhood Traffic Study for Zones 9, 14, 15 & 17. Final Recommendations In summary, the Engineering Division recommends the following changes to the Village Code: Section 18.2004A: Stop Signs Ordinances to be Added Name of Street Direction of Traffic Movement At Intersection With Lincoln Street East and Westbound Main Street Section 18.2004B: Yield Signs Ordinances to be Repealed Name of Street Direction of Traffic Movement At Intersection With Milburn A venue Eastbound Emerson Street Please include this item on the October 6th Village Board Meeting Agenda. Representatives from the Engineering Division and KLOA, Inc. will be in attendance to present the results of the post-studies and final recommendations as well as answer questions. Attachments Neighborhood Traffic Study Zone Map Zone 9 - Traffic Regulation, Volume, Speed & Rand Road Access Maps Zone 14 - Traffic Regulation, Volume & Speed Maps Zone 15 - Traffic Regulation, Volume & Speed Maps Zone 17 - Traffic Regulation, Volume & Speed Maps c: Village Clerk Lisa Angell h: lengineeringltrafficlritcp \zones9-15Ivb Jina'-report j-14-15-17.doc page 7 of7 VILLAGE OF MOUNT PROSPECT f@ t VILLAGE TRAFFIC ZONE MAP &l w ~ Cl "" l;; "" :::> J: 3 ~ 8 7 12 11 LINCOlN ST 14 116 r '!loo"" QUI.... >1>0 17 DEMPSTER ST II~ II IL '~ 1 ~ ~~ lr -l 8 ~~I' [ 1'0 r(~ "1)- ~ II IL OAKTON ST SEMLNOlE LN 1 CAMP MCDONALD RD 2 Cl "" '" w > ;;;: EUCLID AV 4 5 KENSLNGTON RD 6 9 Cl "" 10 ~ 0 ~ CENTRAL RD 15 GOlF RD D POST-STUDIES COMPLETED & PREVIOUSLY APPROVED &l w ~ Cl "" l;; "" :::> J: ~ w D POST-STUDIES PRESENTED FOR APPROVAL FOR THE PURPOSE OF IMPLEMENTING THE: RESIDENTLAL SPEED LIMIT PROGRAM & RESLDENTLALINTERSECTlON TRAFFLC CONTROl PROGRAM NEIGHBORHOOD TRAFFIC STUDY - ZONE 9 VILLAGE OF MOUNT PROSPECT 'OJ t eE- loaD l om '~~~ IDoDO'D'D JODDD'D': l D~Dt;Dt;D~THDA~Tt;[JussE t; , o ~ :IE 8 Z PARK !!! ~ a.. ...J J: ~ 5 ~ ~ w ~ 0 ..J W J DDDD~'~ liDO' Q 8 CENTRAL RD I II r--l II r--l r--llllll eE- J IT ANN R LEGEND ~ EXISTING STOP SIGN ~ EXISTING YIELD SIGN 8 EXISTING TRAFFIC SIGNAL ALL STREETS IN THE NEIGHBORHOOD HAVE A 25 MPH SPEED LIMIT LEGEND NOT TO SCALE 00 = ORIGINAL STUDY TRAFFIC COUNTS (SEPTEMBER 2006) (00) =FIRST POST STUDY TRAFFIC COUNTS (MA Y 2008) [00J =SECOND POST STUDY TRAFFIC COUNTS (NOVEMBER 2008) JUDITH ANN DR 1073 08 ~ :""': 'r nl ~~i'J o "" "" N N-_ N ~ f'0 ~ N ':?~ GREGORY 225 PARK D (I ) DMEMDRY LN [1152J 101<1 GREGORY ST O E(~p~RR~: 0 D- (?7~lj) Q Lf) 0- ""I'-- "'" "'" - "" "" - () 1067 \'0 ~ D D [: 'I 0 ~~ ~ ~::3~i~ ~DN ,":J ~'3:~~ D D (378~USSE !:; 1'--::: U"1 "'" ~ PARK D 0: <1 HENRY S T 627 U;- n -~-~ --' :i t -., (J) "" "" lD (J) N f'0 :::!: ~ ~ Vl_ "" "'" r-~CO -~:::: Cl w L R illllllllllnnl II PROJECT: TITLE: EXIS TING DAILY TRAFFIC VOLUMES 5 VILLAGE OF MOUNT PROSPEC T SECOND POST STUDY ZONE 9 PROJECT NO: 08-121 KLDA FIGURE NO: "3'" ~'-'" NOT TO SCALE '" .b. ~ LEGEND 00 = ORIGINAL STUDY SPEED SURVEYS (SEPTEMBER 2005) (00) = FIRST POST STUDY SPEED SURVEYS (MA Y 2008) [00J = SECOND POST STUDY SPEED SURVEYS (NOVEMBER 2008) t JUDITH ANN DR HIGHLAND 5T ",,,, ,-",Ul '" --J 22 24 22 24 22 24 (21) (23)(20 (23) (IB) (22) [20] [21J GREGORY PARK "'''' "'0 D~:: D GREGORY 5T n ~~~; 23 25 elFIn Lj <25~~5l <20ll25' tJ U lP!e D I ~~ I [] [(II 1?2l1'~~ l~~?:~, g~j ;[j2~' :;;;;, ~:;~, I~~' I D '::-!'::-!SpUASRSKE a:: .b NN ~.b..b. 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AN ORDINANCE AMENDING CHAPTER 18 ENTITLED 'TRAFFIC CODE' OF THE VILLAGE CODE OF MOUNT PROSPECT BE IT ORDAINED BY THE PRESIDENT AND BOARD OF TRUSTEES OF THE VILLAGE OF MOUNT PROSPECT, COOK COUNTY, ILLINOIS ACTING IN THE EXERCISE OF THEIR HOME RULE POWERS: SECTION ONE: That Subsection A, "STOP SIGNS," of Section 18.2004, of "SCHEDULE IV - STOP AND YIELD SIGNS," of Chapter 18 of the Village Code of Mount Prospect, as amended, is hereby further amended by inserting the following: "Name of Street Lincoln Street Direction of Traffic Movement East and Westbound At Intersection with Main Street." SECTION TWO: That Subsection B, "YIELD SIGNS," of Section 18.2004, of "SCHEDULE IV - STOP AND YIELD SIGNS," of Chapter 18 of the Village Code of Mount Prospect, as amended, is hereby further amended by deleting the following: "Name of Street Milburn Avenue Direction of Traffic Movement Eastbound At Intersection with Emerson Street." SECTION THREE: That this Ordinance shall be in full force and effect from and after its passage, approval and publication in pamphlet form in the manner provided by law. AYES: NAYS: ABSENT: PASSED and APPROVED this day of October, 2009 Irvana K. Wilks Mayor ATTEST: M. Lisa Angell, Village Clerk H:ICLKOIWINIORDINANCE2ICH 18-Z0NEs9.14, 15& 17oct2009.doc t\