Uploaded May 2025 | Updated September 2026, 1 day ago
Super 2 highways have been used across Texas for over 20 years, providing operational and safety benefits to rural two-lane highways at lower costs than widening entire corridors to four-lanes. TxDOT requested updated crash modification factors (CMFs) based on a rigorous review and analysis of more recent crash data from the state’s many Super 2 highways. The research team used the existing database of Super 2 highways and site characteristics, combined with additional data on traffic volumes, crashes, and other relevant factors, to develop a comprehensive Super 2 dataset for analysis and identification of relationships between crashes and other characteristics. Using the results of this analysis, they confirmed the safety benefits of Super 2’s, showing a 21% reduction in crashes when implemented. Researchers also defined more CMFs that TxDOT and other practitioners can use to make decisions on installing future Super 2 corridors.
For more information on research project 0-7183, check out the TxDOT Research Library project record here:
https://library.ctr.utexas.edu/Presto/content/Detail.aspx?ctID=M2UxNzg5YmEtYzMyZS00ZjBlLWIyODctYzljMzQ3ZmVmOWFl&rID=MTA3NA==&qrs=RmFsc2U=&q=KHJwLlN0dWR5Tm86KDAtNzE4Mykp&qcf=M2UxNzg5YmEtYzMyZS00ZjBlLWIyODctYzljMzQ3ZmVmOWFl&ph=VHJ1ZQ==&bckToL=VHJ1ZQ==&rrtc=VHJ1ZQ==
For access to all TxDOT research, please visit the TxDOT Research Library at https://ctr.utexas.edu/library/
Super 2 highways have been used across Texas for over 20 years, providing operational and safety benefits to rural two-lane highways at lower costs than widening entire corridors to four-lanes. TxDOT requested updated crash modification factors (CMFs) based on a rigorous review and analysis of more recent crash data from the state’s many Super 2 highways. The research team used the existing database of Super 2 highways and site characteristics, combined with additional data on traffic volumes, crashes, and other relevant factors, to develop a comprehensive Super 2 dataset for analysis and identification of relationships between crashes and other characteristics. Using the results of this analysis, they confirmed the safety benefits of Super 2’s, showing a 21% reduction in crashes when implemented. Researchers also defined more CMFs that TxDOT and other practitioners can use to make decisions on installing future Super 2 corridors.
For more information on research project 0-7183, check out the TxDOT Research Library project record here:
https://library.ctr.utexas.edu/Presto/content/Detail.aspx?ctID=M2UxNzg5YmEtYzMyZS00ZjBlLWIyODctYzljMzQ3ZmVmOWFl&rID=MTA3NA==&qrs=RmFsc2U=&q=KHJwLlN0dWR5Tm86KDAtNzE4Mykp&qcf=M2UxNzg5YmEtYzMyZS00ZjBlLWIyODctYzljMzQ3ZmVmOWFl&ph=VHJ1ZQ==&bckToL=VHJ1ZQ==&rrtc=VHJ1ZQ==
For access to all TxDOT research, please visit the TxDOT Research Library at https://ctr.utexas.edu/library/
