Victorian police pursuits have increased from six to 60 per month, it has been revealed in the wake of the Bourke Street tragedy.

Police have been criticised for not stopping driver Dimitrious "Jimmy" Gargasoulas, despite tailing him for several hours before he allegedly mowed down pedestrians in Melbourne's CBD last Friday, killing five people and injuring dozens more.

However, Deputy Commissioner Andrew Crisp said police pursuits had increased 10-fold within the past six months.

"When it comes to pursuits, we know we've seen a change. We introduced changes six months ago, and we know we've gone from five or six pursuits a month to about 60 pursuits a month," Mr Crisp told reporters on Thursday, nearly a week after the deadly attack.