TOareaFan
Superstar
There's no way to tell from a still photo whether the streetcar entered the intersection on a red, green or yellow light. Plus traffic facing the green still has to check that the way is clear before proceeding - green doesn't mean 'go no matter what'.
Intersections get blocked (momentarily) like this all the time when streetcars aren't even involved.
And when they do its an offense! It is the driver of any motor vehcile's responsibility to not enter an intersection unless he/she is reasonably certain they can clear the intersection safely. It will be a real challenge for the operators of these new vehicles.