201127 Sidbury Road Revised TIA Approval
November 27, 2020
Mr. Don Bennett, PE
DAVENPORT
3722 Shipyard Blvd, Suite E
Wilmington, NC 28403
RE: Revised Approval of the Traffic Impact Analysis (TIA) associated with the proposed
Sidbury Road Development
New Hanover County, NC
Dear Mr. Bennett,
The WMPO, NCDOT, and New Hanover County staffs have reviewed The Porter’s Neck Development TIA sealed
December 13, 2019 with additional information provided on November 11, 2020. 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 Realign the intersection to provide stop control for the southbound approach only, allowing the
eastbound and westbound approaches to operate free flow.
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)
Page 4 of 4
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.
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 910-772-4170 with any questions regarding this approval.
Sincerely,
Kayla Grubb, EI
Project Manager
Wilmington Metropolitan Planning Organization
Ec: Ben Hughes, PE, District Engineer, NCDOT
Jon Roan, Assistant District Engineer, NCDOT
Jessi Leonard, PE, Division Traffic Engineer, NCDOT
Eva Covarrubias, EI, Assistant Division Traffic Engineer, NCDOT
Brad Schuler, AICP, Senior Planner, New Hanover County
Mike Kozlosky, Executive Director, WMPO
Scott James, PE, Transportation Planning Engineer, WMPO