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HomeMy WebLinkAboutSUB201300179 Review Comments Road Plan and Comps. 2014-01-24R R, COMMONWEALTH of VIRGINIA DEPARTMENT OF TRANSPORTATION 1601 Orange Road Culpeper, Virginia 22701 Charles A. Kilpatrick, P.E. Commissioner January 24, 2014 Ms. Megan Yaniglos Senior Planner County of Albemarle Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Re: SDP - 2013 -065 & SUB - 2013 -179 - 5th Street Station Dear Ms. Yaniglos: We have reviewed the Road Improvement Plan for 5th Street Station — Bent Creek Parkway and offer the following comments: 1. Since the new road will connect to Bent Creek Road, the bridge design over Moores Creek should be approved prior to the road plans being approved. 2. The signal design for the intersections of Bent Creek Road/Bent Creek Parkway and Bent Creek Parkway /Avon Street Extended should be approved prior to the road plans being approved. 3. The proposed signal at the intersection of Bent Creek Road and Bent Creek Parkway does not meet the traffic signal spacing requirements with the signal at the intersection of Bent Creek Road and 5th Street. 4. What is the reasoning behind using a design speed of 30 mph? With the connection to two roads that are posted 45 mph, a posted speed limit of 25 mph with an ADT of 8,900 vpd may be low. 5. There is a note on the plan view (Sheet 4A) that the design of the roadway is based on GS -7, Urban Collector with a design speed of 30 mph. There are several aspects of the GS -7 that need to be corrected in these plans: a. The minimum radius at 30 mph is 251 feet. The center line radius appears to be 249 feet. b. At 30 mph with a minimum radius of 251 feet, the road section should have a 4% superelevation. Per TC -5.11, in order to have a normal crown at 30 mph, the minimum radius needs to be 333 feet. Refer to TC -5.11 ULS in the 2008 Road and Bridge Standards. c. A minimum of 200 feet stopping distance needs to be provided based on a design speed of 30 mph. The street trees along Bent Creek Parkway between stations 14 +00 and 18 +00 may impact this requirement. In addition, any parking in the vicinity of this horizontal curve outside of the right -of -way will need to be considered as well. d. The plans indicate that the lane width will be 11 feet. However, note 1 on GS -7 indicates that if the ADT exceeds 2000, the lane width is to be 12 feet. 6. The guard rail warrants need to be provided. In addition, the guard rail location should be shown on the typical sections. 7. Warrants for the turn lanes need to be provided for review. 8. The lane transitions are shown to be 165'. This is based on 11' wide lanes. This needs to be revised based on 12' lanes. 9. A sight easement needs to be provided for Entrance 2. In addition, the street trees along Bent Creek Parkway appear to be in conflict with the sight line for this entrance. 10. The turn lane warrants need to be provided for review. 11. A sight easement needs to be provided for Entrance 3. In addition, the street trees along Bent Creek Parkway appear to be in conflict with the sight line for this entrance. 12. On Sheet 413, there is a note indicating that the taper for the left turn lane for Entrance 3 is 100', however, the taper scales to approximately 65'. This should be revised to meet the minimum taper length. 13. If the temporary turn around shown at station 33 +50 will become a permanent entrance, it will need to be constructed to commercial entrance standards including minimum radii of 25'. If the turnaround will be removed, I would recommend the curb and gutter end at structure D -13 and extended toward Avon when Bent Creek Parkway is extended. 14. The plans need to be clarified to clearly indicate the end of VDOT right -of -way. Currently, the same line type is shown throughout the road plans for the right -of -way. 15. It is our understanding that the roadway from station 34 +00 to Avon Street Extended, including the park and ride, will be privately owned and maintained. 16. The connection to Avon Street Extended shown on the profile on sheet 6C should be a vertical curve. 17. Sight distance 7 (233') does not meet minimum sight distance. 18. What is Proposed Sight Distance 5 Profile attempting to show? 19. What is Proposed Sight Distance 9 Profile attempting to show? 20. The street trees as shown appear to conflict with the sight lines of several of the entrances and as previously mentioned, may interfere with the stopping sight distance through the horizontal curve between station 14 +00 and 18 +00. 21. The street trees along Avon Street Extended need to be located at least 30 feet from the end of the radius as indicated in Appendix B(1) of the Road Design Manual. 22. VDOT maintenance of the storm sewer system will end at the structures located within the dedicated right -of -way. 23. Notes need to be added to the storm sewer profiles indicating that standard steps (ST -1) will be required on all storm structures with a depth of 4' or greater and that safety slabs (SL -1) will be required on all storm structures with a depth of 12' or greater in accordance with the 2008 Road and Bridge Standards. 24. The invert of structure B -3 from structure B -11 is lower than the invert out of structure B- 3 on the profiles labeled "Proposed Storm Profile — (B -1 to B -9) and "Proposed Storm Profile — (B -3 to B- 11) ". 25. Storm structures B -10, B -11, B -12, and B -13 do not meet minimum height requirements as shown in the 2008 Road and Bridge Standards. 26. While structure C -2 is located on the private section of Bent Creek Parkway, I would argue against allowing a 48' deep structure. I'm not entirely sure how this will be installed and any necessary maintenance is going to be problematic. It appears that this structure and structures C -2, C -3 and C -5 could be removed and runoff from the road could run to structures D -14 and D -13. The lengths of these structures could potentially need to be increased. 27. There appear to be some discrepancies between the hydraulic calculations and the storm sewer profiles. While none of the discrepancies appear to make the design inadequate, the calculations and profiles should match. Segments noted, but not excluded to, are F7- F6, 176 -175, 175 -174, G6 -G5, G5 -G4, G4 -G3, and G3 -G2. 28. The typical sections provided need several revisions, many of which have been previously noted: a. Based on ADT, the travel lanes should be 12' wide. b. Superelevation needs to be provided in accordance with the GS -7 standard and the 2008 Road Design Manual. c. The strip between the back of curb and the sidewalk should be at least 6'. d. The design calculations for the road sections need to be provided for review. 29. The traffic barricade should have the chevrons as shown in the VA Work Area Protection Manual for "Road Closed ". 30. The Maintenance of Traffic Plan should include a plan view showing the signage layout rather than only the details from the VA Work Area Protection Manual. Also, the details should be from the current Work Area Protection Manual (2011 Edition). If you need additional information concerning this project, please feel free to contact me. Sincerely, Tip � Troy Austin, P.E. Area Land Use Engineer Culpeper District WE KEEP VIRGINIA MOVING