A woman who blocked a California freeway on Wednesday told police she was the daughter of a Texas serial killer.

The unidentified driver had a handwritten sign on the back of her car which read: 'TX 45 killer is my dad'. 

Since the 1970s, more than 30 young women have mysteriously disappeared or been found murdered along Texas' Interstate 45, in what has become the state's most notorious killing spree. 

A mile from I-45, lies the 25-acre patch known as 'The Killing Fields', where the bodies of several young women have been found.  It is thought the murders may have been carried out by multiple serial killers.

Detectives have described the remote area as a perfect dumping ground for a serial killer, which has made investigating the cases so difficult. 

The California Highway Patrol in Orange County were called on Wednesday morning after the woman, who had a flare gun, stopped on the southbound 55 in Costa Mesa, ABC7 reports. 

Her actions closed the freeway for more than hour. The woman was taken into custody and police were reported to be investigating her claims.  

CHP Officer Florentino Olivera told The LA Times: 'She was telling the [CHP] she wanted her story to be told that her father was the Texas serial killer.'