[tracipy]: Detect road situations which are a reason for message broadcasting

Implementation Details

Create a new class which extends Vehicle. Within the observe() method, one should detect situations worthy of message emission.

Example situations:

1. A car is travelling on it's route and sees, that an edge is taking way longer than expected (e.g. 2x, 3x longer)

• make sure the information is not already available (car which observes it doesn't already know)

For this, a RoadAccident class may be added as well, so that each car has a list of accidents which it knows about (or something similar)

Implementation notes

# get next traffic light information
traci.vehicle.getNextTLS(vehicleID)
# Return list of upcoming traffic lights [(tlsID, tlsIndex, distance, state), ...]