All parts of entrances and exits on highway right of way, including the radii, shall be confined within the permittee's property frontage. Frontage is that portion of the right of way lying between two most distant possible lines drawn perpendicularly from the centerline of the highway to the permittee's abutting property line.

When the permittees of two or more adjoining properties agree to combine their property frontage for a shared access driveway, the combination would be encouraged and authorized under the applicable regulations. The frontage will then be the portion of the right of way lying between the two most distant possible lines of the combined frontage drawn perpendicularly from the centerline of the highway to the permittees' abutting property lines.

At any intersection of a state highway with another highway, road, or street where the existing right of way is flared or widened to allow for additional sight distance, no access driveway will be permitted within the flared or widened right of way section.

Fixed objects will not be allowed in the highway right of way.

The angle of the driveway from the highway pavement shall be 75 to 90 degrees, except that one-way 45 to 90 degree angle driveways will be permitted for connections to one-way frontage roads or lane divided highways.

All driveway construction shall comply with the Americans with Disabilities Act Accessibility Guidelines and Texas Accessibility Standards requirements and standards. The applicant shall provide appropriate access as determined by TxDOT regardless of the presence of adjacent sidewalks.

The width of a private residential driveway shall not exceed 24 feet measured at right angles to the centerline of the driveway, except as increased by permissible radii. The radius connecting the driveway to the highway pavement shall not be less than 15 feet.

A typical design for a private farm/ranch driveway should provide a 25-feet return radii and a 20-feet throat width. The distance from the edge of the highway pavement to a gate must be sufficient to store the longest vehicle, or combination of vehicles anticipated for use of the property. At a minimum, this distance should accommodate a pickup truck with trailer.

The width of a commercial driveway and the radius of curvature connecting the driveway to highway pavement may vary in size depending on traffic and location and should be selected in accordance with Appendix C of the Roadway Design Manual.

A divided commercial driveway having a one-way in and a one-way out, must provide for a raised separation (4-inch height) between the entry and exit lanes. The separation area may be landscaped or may contain a surface material having a contrasting color to the driveway pavement that will be highly visible to motorists. An excessively wide raised separator may be confusing to motorists and may appear to be two closely spaced two-way driveways. To avoid this problem, the maximum allowable width of a raised separator in a divided driveway is 15 feet. Exceptions to the raised separation requirements must be approved by TxDOT.