The investigation found four things contributed to the car crash on that rainy afternoon in March 2014: drugs, alcohol, speed and not driving to the conditions.

On Saturday night, the car he was driving was displayed in the middle of Civic as a reminder to all those passing by what the consequences of such actions can be.

ACT Policing Sergeant Max Mokrij, of the Territory Targeting Team, said the display was to promote awareness of alcohol and drug safety.

"We want to remind people that there are potentially life-altering consequences of the decisions people make when they go out, and to make sure they make sensible decisions that keep themselves and everyone else safe," Sergeant Mokrij said.

The display is part of a year-long campaign called "What would they think?" which plays on the idea of how loved ones would react if they knew what was going on.

ACT Policing acting chief police officer Commander Michael Chew said everyone had a special someone they should consider when they're out.

"What would your grandmum think if she had to take you to court to face an assault charge? What would your dad think if he had to come down and pick you up from the watch house? Or worse, if your family had to attend the emergency department because you've been intoxicated to the stage where you can't look after yourself?" Commander Chew said.

He said the campaign wasn't about stopping people from having a good time.

"But there is behaviour that's got to come with that as well. The community expects people to behave appropriately when they're out partying."

ACT Ambulance Service chief officer Howard Wren said a combination of heat, dehydration and excessive overindulgence could be a recipe for disaster.

"Traditionally people do party a bit harder at this time of year," Mr Wren said.

"What we're saying is to prepare yourself for an evening out: have a decent meal, stock up on water, party with trusted friends and colleagues, and if people feel they are at risk or concerned and need to reach out for help, they can approach the police or ring Triple-0."