When IH-35 was covered with ice, and I was told by other drivers, not to get on the road, and my immediate supervisor insisted that the load had to be in temple to load outbound trailers for am rtes. Since I had just started I felt my job was on the line if i didn't run. I seen a lot of accidents, jackknife big trucks, and i too had jackknifed but recovered. Turns out interstate was closed at jarrell, tx. And it took 14 hours to get to temple, tx. From S.A.,Tx.