There is a nice video here demonstrating good riding position and good situational awareness moving into an intersection. The rider's attention to detail and awareness may have prevented a nasty crash. Check out this video on the Cycling Saavy site.
I have seen similar situations unfolding at numerous locations in Los Alamos. Especially on our wide E-W roads where like the rider, its possible to have the sun at a bad angle and be screened by overtaking traffic.