Finally nine hours, at 10:15 p.m. Monday night, Interstate 70 reopened after being shut down since 1:15 in the afternoon.

The four-mile stretch of the interstate was closed both east and west of Topeka because investigators suspected a man was carrying hazardous materials in his truck. In the end, nothing lethal was discovered afterall.

The interstate closure caused a massive backup as drivers traveling both east and west had to get off the highway and take a lengthy detour that added hours to their trip.

Bomb squads with electronic equipment carefully inspected the truck, trying to avoid a possible explosion. Authorities in Junction City say the suspect, a 50-year old Arkansas man named Christopher Spence, had allegedly called dispatch there to warn hazardous materials had been left in a Junction City Ramada Inn.

The truck was packed with containers of various sizes, and scrawled with what have been described as anti-government slogans.

The state Transportation Department said the highway's closing extended from the Kansas 4 exit just west of Topeka to the Kansas 99 exit in Wabaunsee County. Traffic was being rerouted onto Kansas 99 and U.S. 24.

The Associated Press contributed to this report.