This Washington Post article gives the time of the crash as being reported on Virginia Homeland Security’s site at 1:14 PM.
Also in article, the Virginia Secretary of Public Safety and Homeland Security, Brian Moran states that a police helicopter filmed the accident.
https://www.washingtonpost.com/graphics/2017/local/charlottesville-timeline/?utm_term=.c1c79fb40454
At 11:22 AM an unlawful assembly was declared per the Washington Post article.