A SEMI-TRAILER driver charged over a deadly seven-vehicle crash on the Newell Highway in central west NSW will remain behind bars after a magistrate found he poses an "unacceptable risk".

Robert Crockford, 50, did not apply for bail and it was formally refused at Parramatta Bail Court on Saturday after he was charged over the crash that killed a young couple north of Dubbo on January 16.

A magistrate at Dubbo Local Court again refused bail yesterday, with court documents showing Crockford was considered at risk of not ­appearing before the court and endangering his alleged victims or the community.

Hannah Ferguson, 19, and her boyfriend Reagen Skinner, 21, died after the pair stopped at the roadworks site when the semi-trailer ploughed into cars stopped at roadworks.

At least 10 other people were injured, including a two-year-old girl, in the accident involving two trucks, four cars and a ute.

NSW Ambulance superintendent Kathy Golledge ­at the time described the crash as "absolute carnage".

Crockford suffered leg fractures and suspected internal injuries. He was discharged from hospital on Friday and arrested by police. He has been charged with 10 offences including two counts of dangerous driving occasioning death.

He is expected to appear at Dubbo court again on April 5 via video link.