Views
4 years ago

Virginia department of transportation traffic - Fauquier County

Virginia department of transportation traffic - Fauquier County

US 29 / 15 Lee Highway &

US 29 / 15 Lee Highway & Route 215 Vint Hill Road DRAFT Evaluation & Recommendations In this configuration traffic from the commercial driveway could be routed as a right out only with left turns and through movements being redirected to the US 29 southbound indirect left signal and Uturning there. However, if Vint Hill Road left turns to US 29 southbound are to remain as in the existing configuration, then re-routing the driveway traffic would have almost no effect on the intersection operations. Planning level cost estimate: $300,000 - $400,000 6. Install dual left turn lanes from US 29 SB to Vint Hill Road. Constructing dual left turns from US 29 SB to Vint Hill Road could reduce the amount of time needed for this phase of the signal, thereby allowing more green time for US 29 through traffic. This would also be a more conventional intersection than the indirect left alternatives and may better meet driver expectation. A second left turn lane would be constructed for US 29 SB to Vint Hill Road. A second eastbound (southbound) lane would be constructed on Vint Hill Road for a minimum of 1200 feet, plus a lane end taper. To minimize cost the additional lane would likely be constructed on the westbound (northbound) side of Vint Hill Road, where there is more existing right-of-way, then Vint Hill traffic would be shifted to the new configuration. See Figure Concept Alternative 6 for a depiction of this alternative. Planning level cost estimate: $300,000 - $500,000 7. Re-grade the vertical curves on US 29 northbound approaching Vint Hill Road to improve stopping sight distance. a. Lower the crest of the hill – lengthen the crest vertical curve b. Raise the low side of the vertical curves by flattening the grades from the crest curve. Potentially include raising US 29 northbound at the Vint Hill Road intersection and adjust the grade back to the crest of the hill on the approach – which would help the intersection sight distances for US 29 southbound lefts and Vint Hill Road right turns. c. Combination of vertical alignment adjustments to both crest curves and sag curves. We have developed a few re-grading options for US 29 northbound. The profiles are based on plan sheets from the project that constructed the current US 29 southbound lanes to make a four-lane roadway. The plans were drawn circa 1953, were scanned to microfiche and then converted to TIF images. Portions of the sheets show paper stretch and movement during the scanning or converting processes. While the information is accurate enough for this conceptual level study, the inaccuracies inherently limit the accuracy and depth of alternative development for the profile adjustment alternatives. We investigated various profile re-grading options for US 29 northbound. We determined that significant changes to the roadway profile are required to meet a design speed of 60 mph. It would be possible to design a profile that requires no cutting of the existing roadway. By not cutting into the existing roadway the profile changes could be made in lifts while maintaining traffic. However, the amount of fill required along the roadway would be 15 to 25 feet. This amount of fill would be extremely expensive if placed in small asphalt lifts. Alternatives that involve cutting into the crest curves along the existing US 29 northbound roadway were also investigated. However, given the amount of rock cut that would be involved and the difficulties that would arise in maintaining traffic during construction, these alternatives were determined to be cost prohibitive. If the US 29 northbound profile is revised, the costs, impacts, and construction issues (including maintenance of traffic) will be roughly equal between any of the alternatives we investigated that would meet a 60 mph design speed. Given that the costs, impacts, and construction issues would be roughly equal, it would be preferable that the US 29 northbound profile match the US 29 Page 12 of 21 Over a Century of Engineering Excellence

US 29 / 15 Lee Highway & Route 215 Vint Hill Road DRAFT Evaluation & Recommendations southbound profile. Having both directions of US 29 use the same profile would allow median cross-overs and intersections to be placed where they are needed without introducing sight distance or other design deficiencies. If the two directions of US 29 use different profiles then cross-overs and intersections will be limited to locations where the two profiles are at nearly the same elevation (much as the roadway is today). Planning level cost estimate: $25,000,000 - $60,000,000 8. Relocate Vint Hill Road to allow for a grade separation between US 29 northbound and Vint Hill Road. This alternative was developed from our work on the revised vertical alignment alternatives. One of the vertical alignment alternatives involves combining the two crest curves in the immediate vicinity of Vint Hill Road (one before the intersection and one just after the intersection) into one crest curve. This eliminates the sag curve between the two crest curves. The low point of the existing sag curve would about 22 feet below the proposed crest curve. In this alternative the Vint Hill Road intersection is relocated to the vicinity of the low point of the existing sag curve, US 29 northbound will bridge over relocated Vint Hill Road, Vint Hill Road will be connected to both directions of US 29 via ramps in the median of US 29. Neither direction of US 29 would stop at Vint Hill Road, but full directional access between US 29 and Vint Hill Road would be maintained. By locating the ramps in the median: • The turn movements to / from Vint Hill Road would be handled at a single intersection. • No additional right-of-way should be needed along US 29. • The median ramps could be built in the first phase of construction and serve US 29 northbound traffic while the revised US 29 northbound roadway and bridge are constructed. Planning level cost estimate: $30,000,000 - $60,000,000 Alternative Analysis and Evaluation We have analyzed and evaluated combinations of the mitigation measures and concept alternatives. Since the rear-end collisions on US 29 northbound are 68% (66 of 97) of the crashes reported from 2005- 2007, addressing these crashes is considered a requirement for any recommended improvements to be successful. Providing adequate stopping sight distance on US 29 northbound to the back of the queue from the Vint Hill Road signal should significantly reduce the rear-end collisions on US 29 northbound. The hillcrest is about 700 feet before the stop bar at the signal. From reviewing the existing roadway profile a driver can see the roadway from the hillcrest to the stop bar from about 40 feet prior to the hillcrest. The maximum queue length that will allow adequate stopping sight distance for various approach speeds is presented in the following table. Maximum Queue Lengths For Adequate Stopping Sight Distance On US 29 Northbound at Vint Hill Road Min. Stopping Available Sight Resulting Max. Speed Sight Distance Distance Queue Length 35 250 740 490 40 305 740 435 45 360 740 380 50 425 740 315 55 495 740 245 60 570 740 170 65 645 740 95 70 730 740 10 Page 13 of 21 Over a Century of Engineering Excellence

Print or Download - Fauquier County, Virginia
fauquier high school renovation and addition - Fauquier County
Marriott Ranch Corporate Retreats - Fauquier County, Virginia
PDR Program Qualifications - Fauquier County
fauquier county purchase of development rights program progress ...
Handout - West Virginia Department of Transportation
2008 - Virginia Department of Transportation
agenda - West Virginia Department of Transportation
Hampton Roads - Virginia Department of Transportation
FINANCIAL REPORT - Virginia Department of Transportation
Business Plan - Virginia Department of Transportation
US-340 Corridor Study - West Virginia Department of Transportation
a policy on Geometric Design of - Virginia Department of ...
2012 Annual Report - Virginia Department of Transportation
tods/logo - West Virginia Department of Transportation
WV Driver Handbook - West Virginia Department of Transportation ...
Public Involvement Process - Virginia Department of Transportation
DMV Annual Report - West Virginia Department of Transportation
DESIGN RECOMMENdATIONS - Gloucester County Virginia
STARS Workshop - West Virginia Department of Transportation
Public-Private Transportation Act - Virginia Department of ...
Route 24 Draft Report - Bedford County, Virginia
Geospatial Transportation Information - West Virginia Department of ...
ntroduction To Field Guide - Virginia Department of Transportation
King William County - Virginia Department of Fire Programs
Download - West Virginia Department of Transportation
Transportation Technical Report - Virginia Department of ...
Tech Memo 5 - Kane County Department of Transportation - Kane ...
Charlotte County - Virginia Department of Fire Programs
Louisa County - Virginia Department of Fire Programs