Trucking company Zaens, owned by Anthony Michael Lennon, committed a total of 192 speed management offences between February 2011 and March 2012, effectively allowing its drivers to speed with impunity.

Three of these offences occurred after one of Zaens' drivers, Vincent Samuel George, slammed head on into a red Ford Mondeo being driven by an elderly couple and their son on the Hume Highway at Menangle in January 2012.

Calvin Logan and his parents Patricia and Donald Logan were killed instantly and George was later found to have been dosed up on illegally obtained methadone.

A Roads and Maritime Services investigation following the triple fatality found that Zaens' drivers had committed hundreds of speeding offences with the company doing little or nothing to stop them.

The company and Lennon eventually pleaded guilty to 192 offences under the state's Chain of Responsibility laws.

On Friday, Downing Centre Local Court magistrate Lisa Stapleton that the numerous offences occurred "because of a failure of Zaens to design a system to ensure compliance with the law".

She rejected the claim by Lennon that the failure of managers to implement the system was to blame.

"Zaens did not make managers responsible for speeding," Ms Stapleton said.

"There was no evidence that management was required to check average speed on logs.

"There was no evidence of a standard time for a particular route."

Drivers often failed to report the speeding offences they had committed.

Lennon had previously told the court that his mere presence in the Zaens office was a deterrent against speeding.

Ms Stapleton rejected this claim.

She imposed a fine of $1,316,469 on the company and Lennon. This is a record fine under the state's chain of responsibility laws, under which trucking companies and their owners are accountable for ensuring their drivers comply with the law.

Lennon left the court part way through the judgment.