A PROBATIONARY driver's estimated alcohol reading and speed - and the fact that she was driving naked at the time - were used as evidence yesterday to commit the teenager for trial on culpable driving.

Jessica Maree Langford, 19, pleaded not guilty to the charge and to dangerous driving causing the death of her boyfriend at Hastings on November 29 last year.

Jessica Langford (right) faces charges of culpable driving. Credit:Justin McManus

Melbourne Magistrates Court heard that Langford's speed was calculated at 104 km/h in a 90 km/h zone and her blood alcohol concentration at .09 about two hours after the crash.

She and Daniel Andrew Glover, 19, had been ''skinny dipping'' at Shoreham around midnight and remained naked after using their clothes to dry off. Langford later told police they had been drinking at the beach and that swimming in the nude had been fun, but denied any sexual activity happened while driving.