The Rolling Blind Spot

DataDan

Mama says he's bona fide
Just when I thought I'd heard about all the possible variations on the RBS, I came across a new one today.

You're on a side street, waiting to make a right turn on a multi-lane main street. A large, opaque vehicle approaching from the left slows to turn right onto the street you're turning from. There is no traffic control on the big street, but thinking the other vehicle has blocked potential threats, you go. Then, a car that was behind and to the left of your blocker suddenly swoops into your lane, sideswiping you.

Though this situation is different, the lesson from previous posts still applies: If your sightline to a potential threat is blocked, you have to assume that a threat is there and proceed accordingly. In this case, you would wait until the blocker's turn is far enough along that you can see threats it had screened out.

If the blocker had not been there and you had seen the other car coming, you would time your turn so as not to end up alongside it. Move out quickly to get ahead of it if you can. If not, wait for it to pass. The worst possible time to turn would put you in the car's blind spot as you finish, vulnerable to a lane change. With the blocker present, you're unable to see the threat and thus can't time your turn for safest positioning.
 
It pretty much comes down to the sightline, always. If you can't see around it, you don't know what's coming or what's there.
 
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