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Garcia, Rene, P.E. (October 1, 2014). "Freeways". Roadway Design Manual. Texas Department of Transportation. Chapter 3: New Location and Reconstruction (4R) Design Criteria, Section 6. Archived from the original on May 14, 2013. Retrieved November 27, 2017.{{cite web}}: CS1 maint: multiple names: authors list (link)
Garcia, Rene, P.E. (October 1, 2014). "Freeways". Roadway Design Manual. Texas Department of Transportation. Chapter 3: New Location and Reconstruction (4R) Design Criteria, Section 6. Archived from the original on May 14, 2013. Retrieved November 27, 2017.{{cite web}}: CS1 maint: multiple names: authors list (link)