Interstate 35 runs from Dallas to Houston and holds the title of the second-deadliest road in the United States, with someone killed on it every two hours. This episode of the World's Deadliest Roads series asks why Texas leads the country in traffic accidents, reporting one every 56 seconds statewide, and finds its answer in the highway's mix of heavy truck traffic, sudden weather, and relentless speed. The centerpiece is the February 11, 2021 pile-up in Fort Worth, where ice and near-zero visibility caused a crash involving nearly 130 vehicles and killed six people; archive footage and witness testimony reconstruct how it unfolded minute by minute. The film follows the people whose work and lives depend on the road: police, firefighters, rescue crews, and commuting families who describe driving I-35 in fear every day. It builds a picture of a highway shaped as much by economics and geography as by bad luck.