HomeMy WebLinkAboutSUB202000098 Correspondence 2020-08-03 (2)SHIMP ENGINEERING, P.C.
Design Focused Engineering
July 31, 2020
Adam Moore, PE
VDOT - Charlottesville Residency
701 VDOT Way
Charlottesville, VA 22911
RE: Response Letter #1 for SUB202000098 Galaxie Farm Road Plan — VDOT
Dear Adam,
Thank you for your review of the Road Plans for Galaxie Farm Subdivision. This letter contains
responses to VDOT comments dated June 23, 2020. Our responses are as follows:
1. Please provide left turn lane analyses for Route 20.
Turn lane warrants included.
2. CG-12's will be needed at all intersections for crosswalks. Also they must be aligned to direct
pedestrian traffic directly to the corresponding ramp.
CG-12's provided for all intersections, they are aligned at narrow & perpendicular sections
of the intersections.
3. Road B 1 vertical curve, PVI sta. 10+28.00, K value does not meet min., K value. For a crest
curve with a design speed of 25 mph, needs to be a K value of 12. And PVI sta. 11+50.40 the
min., standard K value for a sag curve with a design speed of 25 mph, needs to be a K value of
26, please adjust accordingly. Please adjust Road D as well the sag and crest curves do not meet
the min., K value standards.
Road B vertical curves revised to fully comply with VDOT standards for a 25 mph road.
Since this street is expected to handle future traffic which would likely put the daily trip
count over 400, crest K of 12 and sag K of 26 have been provided.
For Road D, since trip count < 100, AASHTO Guidelines for Very Low Volume Local
Roads were used to determine sight distance. Sheet 35 of this book states that a sight
distance of 125' is appropriate for this scenario.
4. Recommend bump outs, for parking especially at intersections. If no parking please label on plans
and typical section. Please rcf - to VDOT's Road Design Manual appendix 13(1)-7; geometric
design standards for residci id mixed use subdivision streets (GS-SSAR.)
Bump -outs provided for Road B parking. Road A, B1, D, and E are no parking (signage
added) and Road C does not need bump -outs as there are no intersections near the area
suitable for parking.
5. Please label streets if public or prn are.
Pubf etprivate labels added.
6. Please provide bollards at the end of road F. Show geometry and recommend reinforced turf.
Road F no longer exists, however bollards have been provided for fire access road.
912 E. High Sr. Charlottesville, VA 22902 1434.227.5140 1 shimp-engineering.com
All cul-de-sac's for circular turnarounds on short low volume residential cul-de-sac streets the
45ft., minimum radius may be reduced to 30 ft., when specifically approved by locality in
consultation with emergency services. Please provide documentation on approval from
emergency services.
Documentation pending.
8. Please provide drainage calculation tables on the plan set.
To-do.
9. Please provide sight distance lines and profiles on plan sheets.
Sight distance lines and profiles provided.
10. Please plot HGL on storm sewer profiles.
HGL plots are forthcoming, achievement of open channel flow in all storm sewer suggests
HGL results will not pose an immediate design concern.
11. All proposed drainage structures outside of right of way, will need permanent drainage
easements.
Drainage easements added.
12. The sides of the cul-de-sac at Road B 1 should be temporary easement to be vacated when/if the
road is extended.
The sides of the Road Bl culdesac have been revised to be public access easements instead
of ROW.
If you have any questions or concerns about these revisions, please feel free to contact me at
Keane@shimp-en ing eerine com or by phone at 434-227-5140.
Regards,
Keane Rucker, EIT
Shimp Engineering, P.C.
912 E. High St.. Charlottesville, VA 22902 1434.227.51401 shimp-engineenrig.rom