The women's time trial starts at 12:30 London time Wednesday and is over a 29 km course. The men's time trial starts at 14:15 Wednesday and is over a 44 km course. Competitors start at 90 second intervals for both. Subtract 5 hours to get Eastern time in North America.
I can't find anything that gives the order of the competitors. Anyone know how it is determined? In the grand tours it is reverse order of overall standing but I have no idea how they do it for the Olympics.