200212 Sidbury Road Approval_
February 12th, 2020
Mr. Tim Lowe, PE
Davenport Transportation Consultants
3722 Shipyard Blvd, Suite E
Wilmington, NC 28403
RE: Approval of the Traffic Impact Analysis (TIA) associated with the proposed
Sidbury Road Development
New Hanover County, NC
Dear Mr. Lowe,
The WMPO, NCDOT, and New Hanover County staffs have reviewed The Porter’s Neck Development TIA sealed
December 2nd, 2019. This approval is based on the following land uses and build years:
Phase 1 – Build Year 2024
258 Single Family Homes (LUC 210)
Phase 2 (including Phase 1) – Build Year 2029
421 Single Family Homes (LUC 210)
59 Townhomes (LUC 220)
Full Build (including Phases 1 and 2) – Build Year 2034
655 Single Family Homes (LUC 210)
103 Townhomes (LUC 220)
Based on review of the analysis provided in the TIA report, the following improvements are required by the
developer:
Phase 1
US 117 (N. College Road) and SR 1318 (Blue Clay Road) (signalized full movement intersection)
o No improvements are recommended.
Page 2 of 4
SR 1336 (Sidbury Road) and SR 1318 (Blue Clay Road) (stop controlled T-intersection)
o No improvements are recommended.
SR 1336 (Sidbury Road) at SR 2181 (Dairy Farm Road) (stop controlled T-intersection)
o No improvements are recommended.
SR 1336 (Sidbury Road) and Buck Drive/Proposed Site Access 1 (proposed RIRO)
o Provide an eastbound right turn lane with 75 feet of storage, 50 feet of full width deceleration, and
200 feet of taper.
o Construct the northbound approach with one ingress and one egress lane.
o Provide stop control for the northbound approach.
o Provide a 100 foot internal protected stem.
SR 1336 (Sidbury Road) and Edna Buck Drive/Proposed Site Access 2 (proposed stop controlled full
movement intersection)
o Provide an eastbound right turn lane with 100 feet of storage, 50 feet of full width deceleration, and
200 feet of taper.
o Provide a westbound left turn lane with 50 feet of storage, 50 feet of full width deceleration, and
200 feet of taper.
o Construct the northbound approach with one ingress and one egress lane.
o Provide stop control for the northbound approach.
o Provide a 100 foot internal protected stem.
US 17 and SR 1336 (Sidbury Road) (signalized NB directional crossover and adjacent SB to NB U-turn)
o No improvements are recommended.
US 17 and SR 1571 (Scotts Hill Loop Road south) (signalized SB directional crossover) Construct
eastbound approach with one ingress and one egress lane.
o No improvements are recommended
Phase 2
US 117 (N. College Road) and SR 1318 (Blue Clay Road) (signalized full movement intersection)
o Provide a westbound right turn lane on Blue Clay Road with 250 feet of storage, 50 feet of
deceleration, and 200 feet of taper.
o Extend the westbound left turn lane to 300 feet of storage, 50 feet of deceleration, and 200 feet of
taper.
o Provide a southbound right turn lane on N College road with 250 feet of storage, 50 feet of full
width deceleration, and 100 feet of taper.
o Extend the existing northbound right turn lane on N College Road to provide 400 feet of storage, 50
feet of full width deceleration, and 100 feet of taper.
o Provide protected + permitted overlap phasing for westbound and southbound right turn lanes.
o Optimize existing signal timing splits.
SR 1336 (Sidbury Road) and SR 1318 (Blue Clay Road) (stop controlled T-intersection)
o Construct a single lane roundabout
Page 3 of 4
SR 1336 (Sidbury Road) at SR 2181 (Dairy Farm Road) (stop controlled T-intersection)
o No improvements are recommended.
SR 1336 (Sidbury Road) and Buck Drive/Proposed Site Access 1 (proposed RIRO)
o No additional improvements are recommended.
SR 1336 (Sidbury Road) and Edna Buck Drive/Proposed Site Access 2 (proposed stop controlled full
movement intersection)
o No additional improvements are recommended.
US 17 and SR 1336 (Sidbury Road) (signalized NB directional crossover and adjacent SB to NB U-turn)
o No improvements are recommended.
US 17 and SR 1571 (Scotts Hill Loop Road south) (signalized SB directional crossover) Construct
eastbound approach with one ingress and one egress lane.
o No improvements are recommended.
Full Build
US 117 (N. College Road) and SR 1318 (Blue Clay Road) (signalized full movement intersection)
o No additional improvements are recommended.
SR 1336 (Sidbury Road) and SR 1318 (Blue Clay Road) (stop controlled T-intersection)
o No additional improvements are recommended.
SR 1336 (Sidbury Road) at SR 2181 (Dairy Farm Road) (stop controlled T-intersection)
o Provide an exclusive southbound left turn lane with 50 feet of storage, 50 feet of full width
deceleration, and 200 feet of taper.
o Restripe the existing shared left/right lane to provide an exclusive right turn lane.
SR 1336 (Sidbury Road) and Buck Drive/Proposed Site Access 1 (proposed RIRO)
o No additional improvements are recommended.
SR 1336 (Sidbury Road) and Edna Buck Drive/Proposed Site Access 2 (proposed stop controlled full
movement intersection)
o No additional improvements are recommended.
US 17 and SR 1336 (Sidbury Road) (signalized NB directional crossover and adjacent SB to NB U-turn)
o No improvements are recommended.
US 17 and SR 1571 (Scotts Hill Loop Road south) (signalized SB directional crossover) Construct
eastbound approach with one ingress and one egress lane.
o No improvements are recommended
SR 1336 (Sidbury Road) and Proposed Site Access 3 (proposed stop controlled T-intersection)
o Provide an eastbound right turn lane with 100 feet of storage, 50 feet of full width deceleration, and
200 feet of taper.
Page 4 of 4
o Provide a westbound left turn lane with 50 feet of storage, 50 feet of full width deceleration, and
200 feet of taper.
o Construct the northbound approach with one ingress and one egress lane.
o Provide stop control for the northbound approach.
o Provide a 100 foot internal protected stem.
Note: A signal agreement is required for new signal installations or signal plan modifications. Contact the
Division Traffic Engineer at (910)341-2200, to initiate a Traffic agreement.
If changes are made to the proposed site driveways and/or land use, the current trip distribution may need to
be modified and would require a revised Traffic Impact Analysis to be submitted for review by the NCDOT,
WMPO, and New Hanover County. This approval will become null and void.
The applicant is required to obtain all applicable New Hanover County and NCDOT permits for access to the
road network. All applicable NCDOT and New Hanover County technical standards and policies shall apply.
Please contact me at 910-341-7890 with any questions regarding this approval.
Sincerely,
Abby Lorenzo
Senior Transportation Planner
Wilmington Metropolitan Planning Organization
Ec: Ben Hughes, PE, District Engineer, NCDOT
Dan Cumbo, PE, Deputy District Engineer, NCDOT
Madi Lee, EI, Development Review Engineer, NCDOT
Jon Roan, Assistant District Engineer, NCDOT
Jessi Leonard, PE, Division Traffic Engineer, NCDOT
Brad Schuler, AICP, Senior Planner, New Hanover County
Mike Kozlosky, Executive Director, WMPO