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Originally Posted by Maker
How can they crash?
Way #1
The 3:00 car enters the rab already moving. Trivial to reach 20mph. Car did yield (was not required to stop) since they are watching traffic, see just that one other car in the inside lane, and safely enter the rab not next to that car with spacing.
The inside car exits across the path of the 3:00 car.
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The 3:00 car overtakes the car already in the RAB. DON'T DO THAT!
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Way #2
Both cars traveling with a reasonable gap between them. Car on the inside lane slows down to make the exit "safer" by checking their mirrors. Then exits in front of outside lane car.
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Why would someone slow down in the RAB? To check their mirrors? They are in a turn and might only see flowers.
Even so, the 3:00 car overtakes the car already in the RAB. DON'T DO THAT!
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Way #3
Car in outside lane is not from the entitled TV population and is expecting a car in the inside lane to USE TURN SIGNALS, and they fail to do so.
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If a driver on the road today expects anyone to use their turn signals or believes that anyone is going to follow their turn signals they need much more experience.
But in any case, the 3:00 car overtakes the car already in the RAB. DON'T DO THAT!
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Way #4
There is a third car in the inside lane. First car exits rab, and the car in the outside lane brakes to avoid a collision. The car following the outside lane exits very close the back of the car braking because they expected that car to move at the same speed. Exiting car brakes to avoid hitting the rear of that breaking car. But there is a 4th car, it's in the outside lane. Reaction time kicks in and by the time they brake to avoid the mess ahead, that 3rd car exits, crashing into them.
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Seems like all of that is following too closely and inattentive driving. DON'T DO THAT!
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All cars are following all signs, all posted how-to-drive maps, all recommended "safe" advice from our keyboard experts.
BUT
If the outside lane must exit at every side road. (barriers prevent going around)
The only way to go around (pass a side road) is via the inside lane.
There would be none of this endless debates. Crashing at the rab exits would not be possible in any scenario because there would be no lane with vehicles to crash with.
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As others have suggested, just merge two lanes of traffic to one through the RAB then expand back to two only to merge again at the next RAB. And some think we have traffic problems now!
These are examples of impossible physics, unsafe driving, inexperience, or some combination of the three. They may speak to the expected level of driving skills but none expose an inherent flaw of the RAB or signage.
We don't say that roads are unsafe because someone traveling 55mph might be hit by someone behind them traveling mph. Instead we say that the driver traveling 85mph was in the wrong.
We don't say that red lights are unsafe because rear-end crashes happen at signaled intersections. Instead we say that drivers need to pay more attention.
Unfortunately, we *do* take away flashing yellow turns because a crash has occurred when a driver did not look hard enough to see oncoming traffic. That was still the driver's fault and not a flaw with the intersection. But if we are going to cater to the least common denominator then we'll soon be back to someone carrying a light and walking in front of the horseless carriage.