Research shows that wearing your mask, and opening the front passenger window, and the window behind the driver seat helps to reduce the spread of the novel coronavirus in your vehicle. See this NY Times article.
I usually leave from my home in North Oshawa (Taunton & Harmony) at around 8:30 am. I take Hwy 401 from Harmony and exit at Victoria Park, usually arrive at my office (Sheppard & Yorkland) at around 9:20 am. I leave work at 5:30 pm, usually take Hwy 401 from Warden and exit at Harmony. During the school year, on most Tuesdays and Wednesdays night I play badminton in Markham, so keep this break in routine in mind.