Where Each Segment Stands
Williamson County publishes a construction report every two weeks, but it is 21 pages of tables and it never says which segment your land is on. This is the same information, read straight out of the county's own documents and kept current. Verified October 20, 2026.
Tap the map to open it full size and zoom in.
| Seg | Limits | Status | Where it stands |
|---|---|---|---|
| 1 | SH 130 → CR 137 | Open | Ribbon cut October 18, 2023. |
| 2 | CR 137 → CR 404 | Open | Ribbon cut October 8, 2026. $53.1M, 2023 Road Bond. East Wilco Highway now runs from SH 130 in Pflugerville to Chandler Road in Taylor. |
| 3 | CR 404 → US 79 | Under construction | Building as the FM 3349 / US 79 interchange. Finish expected Spring 2027. |
| 4 | US 79 → Chandler Rd | Planning | Schematic complete. No funded construction date published. |
| 5 | Chandler Rd → SH 29 | In design · ROW | 10 of 27 parcels acquired or under a Possession and Use Agreement. Bid letting Spring 2027, construction Spring 2027 to Fall 2028. |
| 6 | SH 29 → FM 971 | In design · ROW | 3 of 19 parcels acquired or under a Possession and Use Agreement. Bid letting Summer 2028, construction Summer 2028 to Summer 2029. |
| 7 | FM 971 → CR 330 | Planning | Schematic complete. No funded construction date published. |
| 8 | CR 330 → CR 305 at I-35 | Planning | Corridor E5 schematic complete. Construction listed as TBD. |
Corridor study name → construction segment
The county uses two numbering systems and never explains the difference. If your letter says “Corridor E5,” it means Segments 7 and 8.
| E1 | SH 130 → US 79 (Southeast Loop) | Segments 1–3 |
| E2 | US 79 → Chandler Road / Corridor B2 | Segment 4 |
| E3 | Chandler Road → future SH 29 | Segment 5 |
| E4 | Future SH 29 → Ronald Reagan Ext. / Corridor D | Segment 6 |
| E5 | Ronald Reagan Ext. → I-35 / CR 305 | Segments 7–8 |
How we built this. The alignment was digitized from the published curve tables in Williamson County's own design schematics for Corridor E4 and Corridor E5, and checked against the county's published stationing — 36,999 ft of published chainage measures 36,841 ft along the drawn line. The section open to traffic, the town locations and the county outlines come from OpenStreetMap and the US Census. Status comes from the county's Corridor Program construction report of September 25, 2026 and county news releases of October 8, 2026.
What it can’t tell you. Williamson County has not published an alignment in coordinate form for Segments 3 to 5, so nothing is drawn through that stretch. Everything shown is centerline, not right-of-way — this map cannot tell you whether your tract is affected or how much of it is taken. That takes the county’s right-of-way parcel plat, and getting it is one of the first things we do. Every source schematic is stamped preliminary and not for construction.