Bicyclists can do ~35mph on that stretch, which is about 50 feet per second. She was around the bend for at least 3 seconds before she impacted the van, plenty of time for the van to see her and for her to slow down or turn off if the van had turned before she came around the bend.
More likely than not, she was already around the bend, nearly to the intersection when the driver turned. It's quite shady in that section, so it's possible the driver lost her in the shadows, or just wasn't paying close enough attention.
https://www.google.com/maps/preview#!q=Elk+Tree+Road%2C+Wood...
Bicyclists can do ~35mph on that stretch, which is about 50 feet per second. She was around the bend for at least 3 seconds before she impacted the van, plenty of time for the van to see her and for her to slow down or turn off if the van had turned before she came around the bend.
More likely than not, she was already around the bend, nearly to the intersection when the driver turned. It's quite shady in that section, so it's possible the driver lost her in the shadows, or just wasn't paying close enough attention.