Construction traffic, access routes, road capacity, and infrastructure impacts.
Representative photograph of rural construction and roadwork. Not Project Mustang. Photo: Rodolfo Gaion / Pexels.
Williamson County records now document months of active coordination over a future arterial alignment along the east side of Project Mustang, including a June 22 meeting and a revised July 22 two-option road exhibit.
Last verified September 5, 2026
Official production record — July 22, 2026. Kimley-Horn’s conceptual Williamson County Future ROW Alignment exhibit shows the Project Mustang site concept, four main buildings, auxiliary/admin buildings, detention ponds, floodplain, railroad, pipeline/electric easements, the existing US 79 median break, a 70-foot proposed City ROW, the current County LRTP path, and two potential 136-foot County ROW realignment options. The exhibit itself states that it is conceptual and was produced without the benefit of a survey. Click the image for the source PDF.
What the County Production Confirms
May–June 2026
Developer sought alignment flexibility
Kimley-Horn contacted Williamson County about the County Long-Range Transportation Plan (LRTP), explaining that Taylor’s thoroughfare plan called for an Industrial Boulevard on the west side of the site and asking whether the City and County roadway plans could be better aligned. On June 15, Kimley-Horn identified the site as parcels R006648 and R006650 and said it was already under City of Taylor review.
Confirmed correspondence
June 22, 2026
County / Kimley-Horn meeting
A July 2 follow-up states that Kimley-Horn and County staff met June 22 to discuss the Williamson County LRTP on the east side of the property. The July 2 exhibit proposed a possible realignment intended to account for the US 79 median break, pipeline easements, and existing surrounding homes.
Meeting referenced in records
July 8, 2026
County required a more detailed resubmittal
Williamson County Senior Engineer Pat Womack asked Kimley-Horn to show the current and proposed arterial alignments with 136-foot ROW, aerial imagery, floodplain limits, ties to the LRTP north and south of the site, and horizontal geometry meeting a 45-mph design, including a 1,080-foot minimum curve radius and 200-foot tangents between curves.
County engineering response
July 22, 2026
Two potential County ROW options submitted
Kimley-Horn returned a revised exhibit with the existing LRTP corridor in gray and two potential 136-foot ROW alternatives in red and orange. Kimley-Horn stated that both proposed paths met the requested 45-mph design criteria and identified the US 79 median break, pipeline easements, and structures north of US 79 as constraints.
Developer submittal
City hearing disclosure
Traffic Impact Analysis required before preliminary plat
At the August 18 hearing, City staff confirmed that the formal Traffic Impact Analysis is required before preliminary plat. The current Employment Center review therefore does not contain the final project traffic analysis.
City hearing disclosure
Proposed / documented
City Industrial Boulevard west / County arterial east
Current planning materials distinguish a proposed City Industrial Boulevard on the west side of the site from the Williamson County future arterial corridor on the east, where County records use a 136-foot ROW.
Proposed / documented
What the July 22 Exhibit Shows
Four large conceptual data-center buildings, plus administration and auxiliary buildings.
Three proposed detention ponds.
A 70-foot proposed City right-of-way on the western side of the site.
The current Williamson County LRTP corridor and two potential 136-foot County right-of-way alternatives along/east of the project site.
The 100-year Atlas 14 floodplain.
The railroad, existing US 79 median break, Oncor/electric easements, Matterhorn Express and other pipeline easements.
Horizontal curve geometry labeled at 1,080-foot radius where the proposed County alignments bend around site/easement constraints.
What Is Still Unknown
The production does not document Williamson County approval of either proposed realignment. Kimley-Horn followed up on July 29 and again on August 4, stating that it was having difficulty obtaining feedback on the latest exhibit and asking for another meeting. No later substantive County response to the July 22 exhibit appears in this production.
Which, if either, future County ROW option Williamson County prefers.
Whether the County LRTP will ultimately be amended or realigned at this location.
Who would construct, dedicate, finance, or maintain the future arterial.
How the future County road would connect north and south beyond the project area.
The final Traffic Impact Analysis, which remains a separate later-stage City/TxDOT review item.
Final construction traffic, truck routes, off-site improvements, and project-caused roadway obligations.
County-produced recordsConcept alternatives documentedNo County alignment approval documented
Primary sources: Williamson County PIA 2026-1507 production received August 18, 2026, including the May–August Taylor / Williamson County Transportation Plan correspondence, July 2 and July 22 Project Mustang road exhibits, and LRTP markup. Open the production →