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HomeMy WebLinkAboutREGISTRY RIDGE PUD, PHASE I - FINAL - 32-95B - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDYV. CONCLUSIONS The following summarizes the significant findings as a result of this study: - The proposed Dalco PUD development traffic can be accommodated on the area streets. It is expected that approximately 11,645 daily, 680 morning peak hour, and 1285 afternoon peak hour trip ends will be generated at this development. - Operation at the Shields/Trilby intersection is currently acceptable. The peak hour signal warrant is on the threshold of being met. Provision of auxiliary lanes at this intersection will delay the warrant for a signal at this intersection. It is expected that this intersection will be signalized prior to the year 2000 if the background traffic and site generated traffic volumes occur. - At the year 2000 short range future,the key intersections will operate acceptably, expect for minor street left turns at the Shields/South Collector intersection in the afternoon peak hour. Northbound left -turn lanes are recommended on Shields Street at both collector roadways with the short range traffic level. A southbound right -turn lane at the south collector roadway is also recommended. - At the year 2015 long range future with full development of the Dalco PUD, the key intersections will operate acceptably, provided further improvements are made. These improvements include widening Shields Street to a five lane cross section and widening Trilby Road to a three lane cross section. A southbound right -turn lane at the north collector roadway intersection with Shields Street is also needed. Signals will be warranted at the Shields/South Roadway intersection. - All collector roadways exiting the site should have two lanes outbound at the intersections with Shields Street and Trilby Road. A Table 4 2015 Peak Hour Intersection Operation Level of Service Intersection AM PM Shields/Trilby (signal) B C Shields/South Roadway (signal) B B Shields/North Roadway (stop sign) EB LT C D EB RT A A NB LT A B Trilby/West Roadway (stop sign) NB LT B B NB RT A A WB LT A A Trilby/East Roadway (stop sign) NB LT B B NB RT A A WB LT A A Table 3 2000 Peak Hour Intersection Operation Intersection Shields/Trilby (signal) Shields/South Roadway (stop sign) EB LT EB RT NB LT Shields/North Roadway (stop sign) EB LT EB RT NB LT Trilby/West Roadway (stop sign) NB LT NB RT WB LT Trilby/East Roadway (stop sign) NB LT NB RT WB LT Level of Service AM PM B B C A A A A C C . A B A A A B A A A A B B A A A A intersection. This improvement is appropriate with Phase II development of the Dalco PUD. - A traffic signal at the south collector street intersection with Shields Street. This signal will likely be required sometime between the short range and long range futures. IV. TRAFFIC IMPACTS A. Total Traffic Impacts In order to determine the future traffic operations at the key intersections, the traffic projections shown on Figures 5, 6, 7, and a were analyzed. The results of the intersection level of service analyses for the short range morning and afternoon peak hours are provided in Table 3. Calculation forms are provided in Appendix C. As indicated in Table 3 with short range level of development, each of the analyzed intersections are expected to operate at acceptable levels of service, except for minor street left turns during the afternoon peak hour at the Shields/South Roadway intersection. These left turns just fall into the level of service E category. It is expected that both Shields Street and Trilby Road will remain two lane roads with auxiliary lanes. Northbound left -turn lanes are recommended at both Shields Street intersections with the collector roadways serving the site, and a southbound right -turn lane is needed at the south collector roadway intersection. Long range traffic projections, depicted on Figures 7 and 8, were analyzed to determine the long range future traffic operation at key intersections. The results of this analysis are shown in Table 4. Calculation forms are provided in Appendix D. It is expected that acceptable levels of service can be maintained, provided roadway improvements are implemented to mitigate the anticipated increase in background and site generated traffic volumes. These improvements include widening Trilby Road to a three lane cross section (one lane in each direction with center left -turn lane) and widening Shields Street to a five lane cross section to accommodate the expected growth in background traffic. With full development of the Dalco PUD, construction of a southbound right -turn lane on Shields Street at the north collector roadway is appropriate in addition to the short range improvements noted earlier. 5 Assumed Roadway System Based upon a review of current and projected traffic volumes, the following assumptions were deemed appropriate for current, short range, and long range conditions. Current - With the current single lane approach geometry on all legs, a signal would be warranted at the Shields/ Trilby intersection. However, by providing right -turn lanes on the Trilby approaches, the signal is not warranted. Traffic should be monitored to determine when signals, are warranted at this intersection. Current levels of service indicate only minor delay being experienced at this intersection. It was assumed that traffic signals will be installed at this intersection prior to the year 2000. - The installation of left -turn lanes is also currently warranted on the Shields approaches at the Shields/Trilby intersection. These improvements are also assumed to be in place prior to the year 2000. Short Range - The planned internal collector roadways connecting to the adjacent arterials are assumed to have two outbound lanes at all locations. These lanes will separate outbound turning movements, thereby reducing vehicular delay, particularly for the minor street right turns. - With development of the Dalco PUD, the following improvements are needed along Shields Street: a) Northbound left -turn lanes at both the north and south collector road intersections; b) A southbound right -turn lane at the south collector road intersection. Lona Range - Widening of Shields Street to provide four travel lanes (two each direction) and a center left -turn lane. - Widening of Trilby Road to a three lane cross section, with one lane in each travel direction and a center left turn lane. - Construction of a southbound right -turn lane along Shields Street at the northern collector roadway 4 — 20/250 -F- 85/330 r- 85/85 TRILBY RD. 40/40 .5/170 — 35/35 -,,t 25/180 25/25 -� I D� CD C3 �� � -W N N N NORTH E= SITE / TOTAL Rounded to the Nearest 5 Vehicles. LONG RANGE AFTERNOON PEAK HOUR TRAFFIC 0 M 0/195 o�- -� - 80/285 /--140/240 30/40 � ) f r 40 130 20/30 00 o o N 00 O M ^O N O 1D 1� M ROAD 10/10 - 25/25 o Ln �O V- N F tooviZZ ' LO� N n W I ROAD � 1 245/245 -0 ) } 95/95 -� o 0 u7 ^ 00 N Figure 8 4 � N o 8� 0/130 — 15/105 — 15/110 `o � -� -15/80 /r-15/15 TRILBY RD. 0/10 �—j 1r + r-- 45/05 y 80/5/5 295 ~ 75/100 - ) f 10/10 N D I I 'n N 50/180 — I G o CD G LO� 10/40 N o in o �� Q N Q ^ N LO N 00 O O vJ N I N 3 wi LOCD N CD NORTH ROAD 20/20 —/ 30/30 Site 1co CD �CD a 0o W SOUTH ROAD 1 N 170/170 —1 ) } 95/95 0 0 f o� - Ln SITE / TOTAL Rounded to the Nearest 5 Vehicles. LONG RANGE MORNING PEAK HOUR TRAFFIC Figure 7 O O n �- 25/150 �-- 90/90 TRILBY RD. 5/100 --: r 30/120 -� 15/15 � I 00 15/15 -� G oo p \� 000 SITE / TOTAL Rounded to the Nearest 5 Vehicles. oo� 0/100 —105 240 ^ aD o f- 50/165 r 30 30 ` 50/85 I roll 1 - 30/35 0 0 30/90 to Ln oN 10/15-� ��o SHORT RANGE AFTERNOON PEAK HOUR TRAFFIC "I� NORTH ROAD 5/5 5 1 15 �3 o N MO CN' N C3 r ) ^] ui SOUTH ROAD u 45/45 - n o ^ - A& N Figure 6 0 9 a 0 0 co 0/100 —10/75 — 20/90 o —15/60 20/20 TRILBY RD. 10/10 + r-15/50 10/145 - �- �/ 40/185 -�- 40/65 1 4 r 10/10 I 10/10 I I n o 0 40 130 — / 5/30 Ln Ln o Lo L� oe Site SITE / TOTAL Rounded to the Nearest 5 Vehicles. SHORT RANGE MORNING PEAK HOUR TRAFFIC NORTH ROAD .w' 1 20/20 ') f 10/10 —� o 0 �Ln oLO CO) o �II w SOUTH ROAD 1 X 45/45 } 45/45 -� o u� o N O A N Figure 5 4 a 0 A& N NO SCALE TRIP DISTRIBUTION Figure 4 B. Site Trip Generation To estimate the traffic generated by the proposed development, standard trip generation equations compiled by the Institute of Transportation Engineers in their report entitled Trip Generation, 5th Edition were utilized. These equations were applied to the appropriate land uses to determine daily, and morning and afternoon peak hour traffic expected to be generated at the site. Table 2 summarizes the results of this analysis for the Dalco PUD. As shown in Table 2, the project, when fully built, would generate approximately 11,645 trips per day with 660 and 1285 trip ends occurring during the morning and afternoon peak hour periods, respectively. C. Trio Distribution Trip distribution assumptions were derived utilizing the relationship of the site to trip attractions in/near the Fort Collins/Loveland area. The trip distribution was developed to be consistent with other planning and traffic studies in the area. Figure 4 illustrates the directional distribution of site traffic. D. Traffic Assignments and Volumes Background Traffic Volumes Background traffic volumes (traffic on the roadways not attributed to the proposed project) were determined as discussed earlier for the years 2000 and 2015 peak hour periods. Site.and Total Traffic Volumes Utilizing the trip generation estimates and the distribution assumptions identified previously, projected vehicle trips were assigned to the adjacent street system. There are four collector streets that access the Dalco PUD. The development was logically divided into areas served by each collector roadway. In some cases, some trips will cross area lines to access the public street system (Shields Street and Trilby Road). Adjustments were based upon minimum time path estimates and the ultimate destination of site traffic beyond the study area. Figures 5 and 6 show the short range site generated and total traffic for the morning and afternoon peak hours, respectively. Figures 7 and 8 show the full development site generated and total long range traffic for the morning and afternoon peak hours, respectively. 3 N i -f NO SCALE INORTH ROAD SOUTH ROAD Iw W W ' / W SITE PLAN Figure 3 Table 1 1995 Peak Hour Intersection Operation Intersection Shields/Trilby (stop sign) EB LT/T/RT WB LT/T/RT NB LT SB LT Level of Service AM PM C C C C A A A A Table 2 Trip Generation Daily A.M. Peak P.M. Peak Land Use Trips Trips Trips Trips Trips in out in out SHORT RANGE Single Family - 300 DU 2865 Specialty Retail - 70 KSF 2850 Subtotal 5715 LONG RANGE Single Family - 200 DU 1910 Town/Patio Homes - 200 DU 1170 Specialty Retail - 70 KSF 2850 TOTAL 11645 58 164 197 106 54 58 197 148 112 222 394 254 38 110 132 70 15 73 73 15 54 58 197 148 219 463 796 487 were estimated onthe basis of August 199.4 traffic counts. Raw traffic counts are provided in Appendix A. Table 1 shows the peak hour operation at the Shields/Trilby intersection. Calculation forms are provided in Appendix B. The intersection currently operates acceptably. Acceptable operation is defined as level of service D or better. C. Background Traffic Conditions Background peak hour traffic volumes for the year 2000 were estimated using information from traffic studies recently undertaken for other developments near the Dalco development. In this manner, previous traffic volume estimates can be utilized, and consistency in the planning process can be realized. Long range traffic volume projections were determined in the same manner. The long range volumes represent the year 2015. It should be noted that both short and long range background traffic volume projections are based upon normal growth patterns, area development, and procedures consistent with the North Front Range Regional. Transportation Plan. Dalco PUD generated traffic volumes are not included in these background traffic volumes. III. FUTURE TRAFFIC PROJECTIONS A. Development AssumDtions The proposed Dalco PUD site plan is shown on Figure 3. The project would provide a variety of land uses including detached and attached residential, and specialty retail. The short range future assumed. development of 100 detached dwelling units and approximately 70,000 square feet of specialty retail. Typical retail uses would include apparel shops, travel agents, florists, real estate offices, hardware stores, and small restaurants. It was assumed, for purposes of the traffic study, that the short range development level would be completed by the year 2000 and that two collector access points would be constructed to both Shields Street and Trilby Road.. Development of the site is expected to commence at the north end of the site and progress southward. It was assumed that the remainder of the Dalco PUD would be completed by the year 2015. The Dalco PUD has a mix of land uses which may reduce trip making. It is expected that some of the specialty retail uses may be owned and/or staffed by some residents living in the residential portion of the development. Additionally, the retail uses are oriented toward serving residents of 'the Dalco PUD and other neighborhoods in their immediate area. Therefore, a further reduction in vehicular trips may be realized. 2 i W N0 1995 PEAK HOUR TRAFFIC Figure 2 0 s N l� i336; � ��ij`' ..:- II )�;. � © ?Y \ vn71� ;591 -`--_ up=� ..•tq �•�• .• u :V - .: F Pits r G` •� ,kl; � ] �p i s,r��� _(�C m- y �I-1 I)�� jt� Yjtl ' ii i ,' � I li—.UIrli �fo - ---_ ake 'Gravel ( 499! _�+- <� f, 5 Pit Me Clellands. ,(1�_,1 ' :.` y�Hl-j, ) y•'•. �t O1•Vi�e� , .rr �1 a9I�-?�"r�. s - _ r� s11 l�j�`='''� _• i =m`p1 .�eo�n-`y Cem ,'.tr►CC�.�,� 1U�If — �68� ' �'dty• I n•�..l i I 50 „!. I,'.I 4qb° It cn r.' `f i I !'saysgoo - l�` t . � �,i' , 1,�/ / /yet•' i1j U) . .. c .;lJ; �fdr3t,. /1 rffl,,' SS I\ 49/6 1j _ HI. -irr �il'sYl'I'fill' \ /499 D!!C/l It p. «' n Trilby TRILBY RD: _ n 1 n Cui el:...", _ 150/ 4923 13 _ I 1 it Nf1/If'I•l Pcn•sf/ t I 11561 -- Redmond co _ 553/ J II \ � l...' , . 1 } l � Gravel - `) --�5040 Pit 1 IResthaven .. , MemoriddIGardens (Cerketery) ,l;_f-} �•�\\, i i. A �; Drive-in I v :;Theater NO SCALE SITE LOCATION • Figure 1 PEAII �J 1 I. INTRODUCTION The Dalco PUD is a mixed use development, proposed in the southwest quadrant of the Trilby Road/Shields Street intersection in Fort Collins, Colorado. As presently planned, the development is a blend of single family homes, townhomes, and local commercial land uses. The site location is shown on Figure 1. Currently, this site is in agricultural use. The purpose of this study is to address the traffic impacts of the proposed development. The focus of this review is the street/road network, which will serve the proposed mixed use development. Specifics regarding interior circulation are not addressed in this report. The interface with the adjacent street system and the Trilby/Shields intersection are addressed. II. EXISTING CONDITIONS A. Existing Road Network The major existing streets in the vicinity of the Dalco PUD are: Shields Street and Trilby Road. Shields Street (CR17) is a north -south city street and county road that will provide direct access to the proposed Dalco PUD. Adjacent to the project site, it has a two lane cross section with a speed limit of 55 mph. There are no intersections in the immediate area of the site with the exception of Trilby Road. There are single family residential uses on the west side of Shields Street, primarily north of Trilby Road. There are a few houses on the west side of Shields Street, approximately 0.75 miles south of Trilby Road. Shields Street currently has approximately 7500-5000 vehicles per day. Trilby Road is an east -west city street and county road (CR34) that will also provide direct access to the Dalco PUD. In the study area, it has a two lane cross section. The posted speed limit is 35 mph. Current daily traffic on Trilby Road adjacent to the site is 1500-2000 vehicles per day. At the Trilby/Shields intersection, each approach has one lane. The Trilby Road approaches to the intersection have stop sign control. B. Existing Traffic Conditions Morning and afternoon peak hour traffic volumes at the Shields/Trilby intersection are shown on Figure 2. These volumes 1 1 1 i 1 1 1 1 1 1 DALCO PUD SITE ACCESS STUDY FORT COLLINS, COLORADO JUNE 1995 Prepared for: Colorado Land Source, Ltd. 8101 East Prentice Avenue, Suite M180 Englewood, CO 80111 Prepared by: MATTHEW J. DELICH, P.E. 3413 Banyan Avenue Loveland, CO 80538 Phone: 970-669-2061 FAX: 970-669-5034