I-45 (NASA 1 Bypass to South FM 518)

This construction project includes improvements on I-45 from NASA 1 Bypass to the south of FM 518, in Harris and Galveston counties.

Planned construction improvements

Planned improvements include the following:

• Reversing and braiding the northbound entrance and exit ramps; this means the northbound entrance and exit ramps will be reversed, and the northbound entrance ramp will go over the northbound exit ramp
• Widening northbound exit ramp to a two-lane exit ramp
• Lengthening Clear Creek frontage road bridges
• Constructing detention ponds
• Constructing noise barrier

Approximately six acres of additional right of way are required for the proposed design changes. No additional displacements are anticipated.

Next steps

• Re-evaluation determination for these design changes anticipated in Spring of 2025

Lane closure and detour information

Lane closure and detour information can be monitored by:

• Checking Houston TranStar for closure and detour information
• Checking DriveTexas.org for closure and detour information
• Following us on the TxDOT Houston Twitter site

Additional project information

• Oct. 6, 2015 - Public Meeting
• Notice
• Notice (Español)
• Project and Meeting Location
• Environmental Assessment Report
• Exhibit Boards
• Handout
• Schematic
• Meeting Summary Report