I&#x27;m pretty sure it&#x27;s the bus.  Generally a already moving vehicle with a green light on straight road has right of way.  The correct action for the autonomous vehicle (or a human driver) would be to wait for all traffic in the lane to clear (for example, after the previous light turns red and there is a lull in the traffic), then make it&#x27;s way around the sandbags.<p>Here&#x27;s my artists rending.  The vertical lane is just the right hand lane, and is &quot;wide&quot;, but still one lane.  The bus is traveling &quot;up&quot; and the Google AV tries to manenouver around the sandbags blocking it&#x27;s way.  Thinking that it can get around in time, the AV starts moving to the left and crashes into the bus.<p>I guess the &quot;one lane&quot; aspect is the confounding variable, but since the autonomous vehicle was stopped, then it takes on the aspect of any other stopped vehicle on the side of the road (ie giving up it&#x27;s right of way).  Just like if you have a road where cars are allowed to park on the side of the road, those cars cannot enter traffic unless it is safe to do so.<p>Edit: Actually, I have no idea.  Did a quick read of California&#x27;s right of way laws, and couldn&#x27;t find anything that jumped out that would cover this situation.<p><pre><code>  |      |
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  |    SS+----
    &lt;-[G]|
  | ^    |
    |    |
  |[B]   |
   [B]   |
  |      |</code></pre>