#motorway #M4 #phantomjam #traffic #photography geograph.org.uk/p/800463
Free to share – please credit Andrew Smith/Geograph
Phantom Jam is bunching, caused when cars start slowing to avoid tailgating.
#motorway #M4 #phantomjam #traffic #photography geograph.org.uk/p/800463
Free to share – please credit Andrew Smith/Geograph
Phantom Jam is bunching, caused when cars start slowing to avoid tailgating.