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8.d) 2014-03-11_TH 97 Lofton Ave Traffic Memo= BO LTON 8,L M B N K , Consulting Engineers & Surveyors � 12224 Nicollet Avenue • Burnsville, MN 55337 Phone (952) 890-0509 • Fax (952) 890-8065 www.bolton-menk.com MEMORANDUM Date: March, 2014 To: Kristina Handt City of Scandia From: Chris Chromy, P.E., P.T.O.E. Jeremy Melquist, EIT Subject: Trunk Highway 97 & County Road 91 (Lofton Ave) Traffic Monitoring Memo Scandia, MN NC® At the request of the City of Scandia, the intersection of Trunk Highway (TH) 97 at County Road (CR) 91 (Lofton Ave) was evaluated to determine existing traffic operations and identify any potential safety issues. Based on the analysis, the addition of hauling trucks at this intersection doesn't appear to appreciably lower the level of service or safety of the intersection. The video of the intersection shows that trucks are able to make all necessary turns safely and efficiently when needed. Right turning trucks onto Lofton Ave tend to turn into the opposing lane if there is no opposing traffic, but have no problem staying in their lane when there is opposing traffic. During the PM peak hour, trucks turning left onto TH 97 started accepting smaller gaps than non -peak hours. This caused some vehicles heading eastbound on TH 97 to slow down for the trucks. Figures 2 and 3 depict the above scenarios. During the February 25, 2014 video log period (6:00 AM to 8:00 PM), the peak truck volumes were comparable to the data collected in December 2013. There have been no crashes at this intersection from November 4, 2013 to January 31, 2014 (since the release of the last report). The Crash Mapping Analysis tool currently has crashes listed through January 3 Pt, 2014. There has only been one crash on the TH 97 and CR 91 corridors during this time period and it was at the intersection of Penrose Ave & TH 97 (collision with a deer). Trucks hauled material from the mine from November 25t'', 2013 to December 20', 2013 and then started hauling again on January 9'. The video log at the TH 97 & Lofton Ave intersection indicates that the drivers appear to be able to negotiate the turning activity with slowing moving vehicles during their turn. It is recommended that the mine officials be requested to advise all drivers to slow their vehicles during the turn to minimize/avoid crossing into the opposing lane of traffic. If drivers continue have difficulty staying in their lane during the turns, it would be suggested that the intersection be revised to accommodate the large trucks. Another option would be to modify the permit to restrict the haul to the shorter wheel based single unit trucks if the larger trucks have difficulty staying in their lane. DESIGNING FOR A BETTER TOMORROW Bolton & Menk is an equal opportunity employer F. "4tn FS�Ny' Existing Conditions TH 97 runs east/west and is classified as a rural minor arterial. CR 91 runs north/south and is classified as a rural major collector. The intersection has two-way stop control with vehicles on CR 91 required to stop. The north leg of the intersection is a two lane approach (left-thru and right) and the south leg is a single approach. The east and west legs of the intersection are two lane approaches (left-thru and bypass/right turn lane). The speed limit on both roadways is 55 MPH. Figure 1 below shows the layout of the intersection. Figure 1: TH 97 & CR 91 (Lofton Ave) Intersection Aerial Turning Movement Counts A 14 hour turning movement count was taken on February 25, 2014 from 6:00 AM to 8:00 PM to capture traffic conditions while trucks were hauling material from the Zavoral Mine. The turning movement count data is included in the attachments. Hauling trucks were classified as any truck that turned left onto TH 97 from CR 91 and any truck that turned right from TH 97 onto CR 91. The following was taken from the February 25" turning movement count: • Hauling trucks were driven to/from the mine from 7:15 AM to 6:00 PM • The hour with the heaviest amount of trucks hauling to/from the mine was 11:00 AM to 12:00 PM (51 trucks) • AM Peak Hour (6:30 AM to 7:30 AM): 494 total vehicles used the intersection (8 trucks going to or from mine) • Mid -Day Peak Hour (11:00 AM to 12:00 PM): 351 total vehicles used the intersection (51 trucks going to or from mine) • PM Peak Hour (4:30 PM to 5:30 PM): 663 total vehicles used the intersection (46 trucks going to or from mine) DESIGNING FOR A BETTER TOMORROW Bolton & Menk is an equal opportunity employer. F. "4tn FS�Ny' The total number of trucks going to or from the mine was 470 (7:15 AM to 6:00 PM), and the number of round trips was 231. Figure 2: Truck turns into opposing lane onto CR 91 DESIGNING FOR A BETTER TOMORROW Bolton & Menk is an equal opportunity employer. !.W, View Help Figure 3: Truck turning onto CR 91 with opposing traffic DESIGNING FOR A BETTER TOMORROW Bolton & Menk is an equal opportunity employer. 4 MMN 011al TRAM( DATA IK Hwy 97 & Lofton Ave Scandia, MN Traffic Data Inc PO Box 16296 St. Louis Park, MN 55416 Groups Printed- Cars + - Trucks File Name : Hwy 97 & Lofton Ave, 2-25-14. 6am-8pm Site Code : 1 Start Date : 2/25/2014 Page No : 1 Lofton Ave Hwy 97 Lofton Ave Hwy 97 Southbound Westbound Northbound Eastbound Start Tltlle UTrn Left Thru Right Peds App. Total UTrn Left Thru Right Peds App. Total UTrn Left Thru Right Peds App. Total UTrnT Left Thru Right Peds App. Total Int. Total 06:00 AM 0 0 1 4 0 5 0 0 82 0 0 82 0 0 0 0 0 0 0 1 8 0 0 9 96 06:15 AM 0 2 0 11 0 13 0 0 81 0 0 81 0 0 1 0 0 1 0 0 7 1 0 8 103 06:30 AM 0 0 0 9 0 9 0 1 77 1 0 79 0 5 0 0 0 5 0 0 26 0 0 26 119 06:45 AM 0 0 0 14 0 14 0 0 75 1 0 76 0 0 1 0 0 1 0 0 41 0 0 41 132 Total 0 2 1 38 0 41 0 1 315 2 0 318 0 5 2 0 0 7 0 1 82 1 0 84 450 07:00 AM 0 0 0 6 0 6 0 0 75 0 0 75 0 4 0 1 0 5 0 0 24 0 0 24 110 07:15 AM 0 3 0 14 0 17 0 1 80 5 0 86 0 1 0 0 0 1 0 2 26 1 0 29 133 07:30 AM 0 8 0 7 0 15 0 0 67 7 0 74 0 3 0 1 0 4 0 2 23 0 0 25 118 07:45 AM 0 7 1 3 0 11 0 0 48 6 0 54 0 1 0 1 1 3 0 3 34 2 0 39 107 Total 0 18 1 30 0 49 1 0 1 270 18 0 289 0 9 0 3 1 13 0 7 107 3 0 117 468 08:00 AM 0 5 1 5 0 11 0 0 65 4 0 69 0 3 1 2 0 6 0 4 45 1 0 50 136 08:15 AM 0 8 0 13 0 21 0 0 45 7 0 52 0 3 0 0 0 3 0 2 24 1 0 27 103 08:30 AM 0 5 0 8 0 13 0 1 65 6 0 72 0 1 1 0 0 2 0 4 28 0 0 32 119 08:45 AM . 0 7 1 9 0 17 0 0 65 5 0 70 0 0 0 1 0 1 0 5 39 2 0 46 134 Total 0 25 2 35 0 62 0 1 240 22 0 263 0 7 2 3 0 12 0 15 136 4 0 155 492 09:00 AM 0 5 0 4 0 9 0 1 63 5 0 69 0 1 0 0 0 1 0 2 39 1 042 121 09:15 AM 0 5 2 7 0 14 0 0 54 5 0 59 0 0 0 0 0 0 0 1 17 0 0 18 91 09:30 AM 0 6 0 7 0 13 0 0 40 5 0 45 0 1 0 0 0 1 0 2 14 1 0 17 76 09:45 AM 0 7 0 4 0 11 0 0 42 5 0 47 0 2 0 0 0 2 0 0 35 1 0 36 96 Total 0 23 2 22 0 47 0 1 199 20 0 220 0 4 0 0 0 4 0 5 105 3 0 113 384 10:00 AM 0 6 14 0 11 0 0 38 8 0 46 0 3 0 0 0 3 0 2 22 0 0 24 84 10:15 AM 1 5 1 8 0 15 0 0 31 5 0 36 0 1 0 0 0 1 0 1 24 2 0 27 79 10:30 AM 0 6 0 5 0 11 0 0 31 7 0 38 0 3 0 0 0 3 0 4 22 0 0 26 78 10:45 AM 0 6 0 4 0 10 0 0 29 4 0 33 0 2 0 0 0 2 0 1 29 0 0 30 75 Total 1 23 2 21 0 47 0 0 129 24 0 153 0 9 0 0 0 9 0 8 97 2 0 107 316 11:00 AM 0 8 0 0 0 8 0 0 36 8 0 44 0 0 0 0 0 0 0 5 31 1 0 37 89 11:15 AM 0 5 0 6 0 11 0 0 38 6 0 44 0 0 0 0 0 0 0 5 32 0 0 37 92 11:30 AM 0 7 1 3 0 11 0 0 36 11 0 47 0 0 0 0 0 0 0 6 18 1 0 25 83 11:45 AM 0 6 0 5 0 11 0 0 23 6 0 29 0 0 0 1 0 1 0 2 42 2 0 46 87 Total 0 26 1 14 0 41 0 0 133 31 0 164 0 0 0 1 0 1 0 18 123 4 0 145 351 12:00 PM 0 5 0 5 0 10 0 0 25 5 0 30 0 4 0 0 0 4 0 2 21 2 0 25 69 12:15 PM 0 8 1 5 0 14 0 2 33 6 0 41 0 0 0 0 0 0 0 5 20 1 0 26 81 12:30 PM 0 3 0 4 0 7 0 2 29 3 0 34 0 0 0 0 0 0 0 3 30 2 0 35 76 12:45 PM 0 5 0 4 0 9 0 0 31 8 0 39 0 2 0 0 0 2 0 3 25 1 0 29 79 Total 0 21 1 18 0 40 0 4 118 22 0 144 0 6 0 0 0 6 0 13 96 6 0 115 305 01:00 PM 0 6 0 2 0 8 0 0 22 8 0 30 0 0 0 0 0 0 0 3 29 1 0 33 71 01:15 PM 0 7 0 6 0 13 0 0 22 6 0 28 0 0 0 0 0 0 0 9 36 1 0 46 87 01:30 PM 0 7 0 3 0 10 0 0 29 9 0 38 0 1 0 0 0 1 0 1 20 0 0 21 70 01:45 PM 0 5 0 3 0 8 0 2 32 7 0 41 0 2 0 1 0 3 0 6 27 1 0 34 86 Total 0 25 0 14 0 39 0 2 105 30 0 137 0 3 0 1 0 4 0 19 112 3 0 134 314 4 MMN 011al TRAM( DATA IK Hwy 97 & Lofton Ave Scandia, MN Traffic Data Inc PO Box 16296 St. Louis Park, MN 55416 Groups Printed- Cars + - Trucks File Name : Hwy 97 & Lofton Ave, 2-25-14. 6am-8pm Site Code : 1 Start Date : 2/25/2014 Page No : 2 Lofton Ave Hwy 97 Lofton Ave Hwy 97 Southbound Westbound Northbound Eastbound Start Tltlle UTrn Left Thru Right Peds App. Total UTrn Left Thru Right Peds App. Total UTrn Left Thru Right Peds App. Total UTrnT Left Thru Right Peds App. Total Int. Total 02:00 PM 0 6 2 4 0 12 0 0 34 5 0 39 0 1 2 1 0 4 0 5 33 1 0 39 94 02:15 PM 0 5 0 4 0 9 0 2 19 10 0 310 3 2 1 0 6 0 3 36 1 0 40 86 02:30 PM 0 7 1 4 0 12 0 0 23 8 0 31 0 2 0 0 0 2 0 10 51 1 0 62 107 02:45 PM 0 6 0 5 0 11 0 0 29 6 0 35 0 1 0 0 0 1 0 7 65 4 0 76 123 Total 0 24 3 17 0 44 0 2 105 29 0 136 0 7 4 2 0 13 0 25 185 7 0 217 410 03:00 PM 0 6 1 2 0 9 0 0 27 6 0 33 0 0 0 0 0 0 0 13 65 1 0 79 121 03:15 PM 0 7 0 7 0 14 0 0 26 6 0 32 0 1 1 1 0 3 0 9 75 4 0 88 137 03:30 PM 0 6 0 2 0 8 0 0 48 9 0 57 0 0 0 0 0 0 0 7 82 1 0 90 155 03:45 PM 0 6 0 3 0 9 0 1 52 8 0 61 0 0 0 2 0 2 0 8 58 1 0 67 139 Total 0 25 1 14 0 40 1 0 1 153 29 0 183 0 1 1 3 0 5 0 37 280 7 0 324 552 04:00 PM 0 7 0 6 0 13 0 0 49 8 0 57 0 2 1 2 0 5 0 4 81 5 0 90 165 04:15 PM 0 5 0 4 0 9 0 0 46 7 0 53 0 1 1 0 0 2 0 7 68 3 0 78 142 04:30 PM 0 8 0 2 0 10 0 1 47 6 0 54 0 1 1 0 0 2 0 8 87 1 0 96 162 04:45 PM . 0 5 0 5 0 10 0 0 60 5 0 65 0 0 1 1 0 2 0 8 83 2 0 93 170 Total 0 25 0 17 0 42 0 1 202 26 0 229 0 4 4 3 0 11 0 27 319 11 0 357 639 05:00 PM 0 8 1 2 0 11 0 2 48 5 0 55 0 1 1 0 02 0 21 73 2 0 96 164 05:15 PM 0 5 0 6 0 11 0 1 53 8 0 62 0 0 0 1 0 1 0 9 83 1 0 93 167 05:30 PM 0 8 1 5 0 14 0 0 42 3 0 45 0 1 1 0 0 2 0 9 89 1 0 99 160 05:45 PM 0 1 0 2 0 3 0 0 43 7 0 50 0 1 0 0 0 1 0 14 82 3 0 99 153 Total 0 22 2 15 0 39 0 3 186 23 0 212 0 3 2 1 0 6 0 53 327 7 0 387 644 06:00 PM 0 2 0 11 0 13 0 0 32 2 0 34 0 2 1 0 0 3 0 8 78 0 0 86 136 06:15 PM 0 0 0 4 0 4 0 0 31 1 0 32 0 2 0 0 0 2 0 7 67 3 0 77 115 06:30 PM 0 1 1 2 0 4 0 1 21 0 0 22 0 1 1 0 0 2 0 8 78 0 0 86 114 06:45 PM 0 1 2 1 0 4 0 0 20 0 0 20 0 0 0 0 0 0 0 6 65 2 0 73 97 Total 0 4 3 18 0 25 0 1 104 3 0 108 0 5 2 0 0 7 0 29 288 5 0 322 462 07:00 PM 0 0 0 4 0 4 0 0 26 1 0 27 0 0 0 1 0 1 0 7 38 0 0 45 77 07:15 PM 0 0 0 6 0 6 0 0 19 0 0 19 0 1 1 0 0 2 0 6 44 0 0 50 77 07:30 PM 0 0 0 2 0 2 0 0 14 3 0 17 0 2 0 0 0 2 0 3 47 0 0 50 71 07:45 PM 0 0 0 2 0 2 0 0 13 0 0 13 0 0 0 0 0 0 0 3 33 4 0 40 55 Total 1 0 0 0 14 0 14 0 0 72 4 0 76 0 3 1 1 0 5 0 19 162 4 0 185 280 Grand Total 1 263 19 287 0 570 0 18 2331 283 0 2632 0 66 18 18 1 103 0 276 2419 67 0 2762 6067 Apprch % 0.2 46.1 3.3 50.4 0 0 0.7 88.6 10.8 0 0 64.1 17.5 17.5 1 0 10 87.6 2.4 0 Total % 0 4.3 0.3 4.7 0 9.4 0 0.3 38.4 4.7 0 43.4 0 1.1 0.3 0.3 0 1.7 0 4.5 39.9 1.1 0 45.5 Cars + 1 32 17 270 0 320 0 15 2159 43 0 2217 0 61 17 13 1 92 0 269 2255 60 0 2584 5213 % Cars + 100 12.2 89.5 94.1 0 56.1 0 83.3 92.6 15.2 0 84.2 0 92.4 94.4 72.2 100 89.3 0 97.5 93.2 89.6 0 93.6 85.9 Trucks 0 231 2 17 0 250 0 3 172 240 0 415 0 5 1 5 0 11 0 7 164 7 0 178 854 % Trucks 0 87.8 10.5 5.9 0 43.9 0 16.7 7.4 84.8 0 15.8 0 7.6 5.6 27.8 0 10.7 0 2.5 6.8 10.4 0 6.4 14.1 4 MMN 011al TRAM( DATA IK Hwy 97 & Lofton Ave Scandia, MN Traffic Data Inc PO Box 16296 St. Louis Park, MN 55416 File Name : Hwy 97 & Lofton Ave, 2-25-14. 6am-8pm Site Code : 1 Start Date : 2/25/2014 Page No :3 Out Lofton Ave Total O 320 649 �r �O 250 498 O7 �c O P5747 1147 i7 O O J O O O p 27017 32 1 0 O T 00 17 2 231 0 0 7rd� 2871 191 263 1 0 O Right Thru Left U r Peds 7 Lp N N �nrV 1 WOW H M a)r 0 N N O O O O N r -- -j North�2 W V M O O O �N[O m Cm� v rn 2/25/2014 06:00 AM 2 = O �InO� >.— tnN 1N 2/25/2014 07:45 PM v ovv oO��� Cars+ C ONON E i Trucks �3 00o waocAnr°�. W � � y 000, -0NVty— N p_ 1 4-1 T r O UTrn Left Thru Ri ht Peds O O O`rO > 0 61 17 13 1 O �otia O 0 5 1 5 0 O O O 0 66 18 18 1 O /7 O O O Torte 0 104 [192 207 OJT Out In Total 4 MMN 011al TRAM( DATA IK Hwy 97 & Lofton Ave Scandia, MN Traffic Data Inc PO Box 16296 St. Louis Park, MN 55416 File Name : Hwy 97 & Lofton Ave, 2-25-14. 6am-8pm Site Code : 1 Start Date : 2/25/2014 Page No : 4 Peak Hour Analysis From 06:00 AM to 09:45 AM - Peak 1 of 1 Peak Hour for Entire Intersection Beqins at 06:30 AM Int. Total 06:30 AM Lofton Ave Southbound Hwy 97 Westbound Lofton Ave Northbound Hwy 97 Eastbound Start Time UTrn I Left Thru Right I Peds I App. Total UTrn Left Thru I Right I Peds App. Total UTrn Left I Thru I Right Peds App. Total UTrn Left I Thru I Right Peds App. Total Peak Hour Analysis From 06:00 AM to 09:45 AM - Peak 1 of 1 Peak Hour for Entire Intersection Beqins at 06:30 AM Int. Total 06:30 AM 0 0 0 9 0 9 0 1 77 1 0 79 0 5 0 0 0 5 0 0 26 0 0 26 119 06:45 AM 0 0 0 14 0 14 0 0 75 1 0 76 0 0 1 0 0 1 0 0 41 0 0 41 132 07:00 AM 0 0 0 6 0 6 0 0 75 0 0 75 0 4 0 1 0 5 0 0 24 0 0 24 110 07:15 AM 0 3 0 14 0 17 0 1 80 5 0 86 0 1 0 0 0 1 0 2 26 1 0 29 133 Total Volume 0 3 0 43 0 46 0 2 307 7 0 316 0 10 1 1 0 12 0 2 117 1 0 120 494 % App. Total 0 6.5 0 93.5 0 0 0.6 97.2 2.2 0 0 83.3 8.3 8.3 0 0 1.7 97.5 0.8 0 PHF .000 .250 .000 .768 .000 .676 .000 .500 .959 .350 .000 .919 .000 .500 .250 .250 .000 .600 .000 .250 .713 .250 .000 .732 .929 Peak Hour Analysis From 10:00 AM to 01:45 PM - Peak 1 of 1 Peak Hour for Entire Intersection Beqins at 11:00 AM 11:00 AM 0 8 0 0 0 8 0 0 36 8 0 44 0 0 0 0 0 0 0 5 31 1 0 37 89 11:15 AM 0 5 0 6 0 11 0 0 38 6 0 44 0 0 0 0 0 0 0 5 32 0 0 37 92 11:30 AM 0 7 1 3 0 11 0 0 36 11 0 47 0 0 0 0 0 0 0 6 18 1 0 25 83 11:45 AM 0 6 0 5 0 11 0 0 23 6 0 29 0 0 0 1 0 1 0 2 42 2 0 46 87 Total Volume 0 26 1 14 0 41 0 0 133 31 0 164 0 0 0 1 0 1 0 18 123 4 0 145 351 % App. Total 0 63.4 2.4 34.1 0 0 0 81.1 18.9 0 0 0 0 100 0 0 12.4 84.8 2.8 0 PHF .000 .813 .250 .583 .000 .932 .000 .000 .875 .705 .000 .872 .000 .000 .000 .250 .000 .250 .000 .750 .732 .500 .000 .788 .954 Peak Hour Analysis From 02:00 PM to 07:45 PM - Peak 1 of 1 Peak Hour for Entire Intersection Beqins at 04:30 PM 04:30 PM 0 8 0 2 0 10 0 1 47 6 0 54 0 1 1 0 0 2 0 8 87 1 0 96 162 04:45 PM 0 5 0 5 0 10 0 0 60 5 0 65 0 0 1 1 0 2 0 8 83 2 0 93 170 05:00 PM 0 8 1 2 0 11 0 2 48 5 0 55 0 1 1 0 0 2 0 21 73 2 0 96 164 05:15 PM 0 5 0 6 0 11 0 1 53 8 0 62 0 0 0 1 0 1 0 9 83 1 0 93 167 Total Volume 0 26 1 15 0 42 0 4 208 24 0 236 0 2 3 2 0 7 0 46 326 6 0 378 663 % App. Total 0 61.9 2.4 35.7 0 0 1.7 88.1 10.2 0 0 28.6 42.9 28.6 0 0 12.2 86.2 1.6 0 PHF 1 .000 .813 .250 .625 .000 .955 .000 .500 .867 .750 .000 .908 .000 .500 .750 .500 .000 .875 .000 .548 .937 .750 .000 .984 .975