The incident occurred when Armstrong and his partner, Anna Hansen, were on their way back from a fundraising event. Armstrong reportedly lost control of his vehicle on icy roads and hit parked cars.
A man who heard the crash and saw that two vehicles belonging to his relatives had been damaged called 911. Hansen reportedly approached the man at his house to apologise for the damage, and stated that she had been at the wheel.
However, when Hansen was questioned about the matter after police heard from a valet that Armstrong had been driving when the pair left the fundraising event, she admitted that a joint decision had been made for her to take the blame, reportedly to protect their children from further time in the media spotlight.
Hansen was not charged and court papers indicate that Armstrong will appear in court on March 17.
The disgraced cyclist was stripped of his seven Tour de France titles and band from cycling for life in 2012 after admitting to taking performance-enhancing drugs.