Daily backups and train delays along the Towne Lake and Cypress corridor could finally get some relief, with Harris County preparing an $81 million Greenhouse Road makeover that dives under U.S. 290 and the Union Pacific tracks. The project will add a six-lane underpass and 10-foot hike-and-bike paths, a combo local officials say should cut both traffic jams and those long, curse-under-your-breath detours when a freight train parks on the crossing. Bidding is projected for the first quarter of 2026, and construction is expected to run through 2030.
Federal money covers most of the tab
In an April update, Harris County Municipal Utility District 500 reported that federal dollars are lined up to cover about 80 percent of construction costs, with design work and utility relocations approaching the finish line. According to Harris County MUD 500, TxDOT will take the lead on bidding and still has to nail down final agreements with Union Pacific before heavy equipment rolls in.
What crews will actually build
The build-out includes a six-lane roadway and 10-foot-wide hike-and-bike paths on both sides of Greenhouse, plus a full reconstruction of the U.S. 290 frontage roads and a larger overpass at Skinner Road. Project renderings also highlight a major pump station and upgraded drainage to better handle stormwater, part of a broader push to make the corridor more flood resilient, as reported by Community Impact.
Coordination with TxDOT and the railroad
MUD 500 notes that the trickiest piece of the job is the tunnel-style underpass below the Union Pacific line, which requires tight coordination with TxDOT and Union Pacific Railroad on right-of-way, access, and construction schedules. The district emphasizes that railroad approvals often decide when work can happen and how long any closures or overnight operations are allowed, and this project is no exception.
Who pays and the local stakes
The remaining local share is expected to come from Harris County Precinct 3, the Harris County Toll Road Authority, Harris County Emergency Services District No. 9, the Houston-Galveston Area Council, and TxDOT, according to the Houston Chronicle. Precinct 3 Commissioner Tom Ramsey told the Chronicle the job is on track to “advertise to bid during the 1st quarter of 2026 with construction lasting through 2030.”
What drivers and residents should expect
Officials caution that the roughest stretch for motorists will be when crews are digging the underpass under the railroad and widening the Skinner Road overpass. That phase will likely bring intermittent closures and detours along U.S. 290 as traffic is shuffled around the work zone. Developers and county leaders also point out that the new connection is expected to open up roughly 85 acres of commercial and mixed-use property along the corridor and improve access to Towne Lake and nearby neighborhoods, per Community Impact.
Between the bid schedule and the way federal funds are allocated by fiscal year, county leaders say the project could move quickly once railroad and state approvals fall into place. Residents should still brace for periodic lane shifts, night work, and construction staging through the back half of the decade. For official notices and to sign up for construction alerts, locals can monitor the Harris County Precinct 3 “Punchlist” and updates posted by utility and planning partners on their websites, including the Precinct 3 newsroom at Harris County Precinct 3.
