A cyclist and car collided on the Four Mile Run Drive access road near Walter Reed Drive, this afternoon. It occurred here:

The ACPD news release:
ARLINGTON, Va. – The Arlington County Police Department is investigating a fatal traffic accident that occurred this afternoon in the 4000 block of Four Mile Run Drive. At approximately 2:56 p.m. on Saturday [Sunday, actually – ed.], May 8, 2011, police responded for a bicyclist that collided with a vehicle.
Investigation revealed that an adult man was riding his bicycle south on South Walter Reed Drive and turned right onto the access road of Four Mile Run Drive. It appears that when he turned onto Four Mile Run Drive, he crossed into oncoming traffic and struck an occupied vehicle. The driver of the vehicle stayed at the scene of the accident. The bicyclist was transported to a local hospital and pronounced dead. He will be identified once the next of kin has been notified.
The Arlington County Police asking that any witnesses of the accident contact the Department at 703 558-2222, or Detective Don Fortunato at 703 228-4197.
This explanation makes sense in light of the markings on the road (I visited the scene after I heard the first ARLnow report, in the hope that I could better understand, first hand, what happened). However, it’s not clear to me, as cyclist who has made this same turn, why the cyclist would have taken that path. The report has the cyclist coming down the hill you see in the left corner of the photo (and it’s quite a long and steep hill), and given the position of the collision, apparently deciding to turn after the slip turn lane you see on the left, and coming completely across into the far lane.

The orange markings are all related to the accident. The square that is roughly next to the bus stop sign is where the car stopped. The orange you see on the left side are – I assume – markings for where various pieces of the bike/clothing/etc. were found. Here’s another view (I’m not terribly keen on publishing any close-up photos):
I’m hoping we get more information soon.
In any event, it’s terribly sad.