TRAFFIC JAM OR TRAFFIC GRIDLOCK: CARAVANA O EMBOTELLAMIENTO

Almost everyday in busy cities we can hear that there are traffic jams in the centre and drivers should choose an optimal way of getting to work or home in the evening. The word "traffic jam" is used very frequently to speak about road conjestion by vehicles.
Sometimes there are jams which stretch for several kilometres and may result in spending the whole day there because traffic does not move at all standing still, in this case we use the words traffic gridlock. A jam is where too much traffic is causing heavy congestion and movement is very slow. Gridlock is when traffic has reached such a state that no movement at all is possible.
To sum up, A jam is where too much traffic is causing heavy congestion and movement is very slow. Gridlock is when traffic has reached such a state that no movement at all is possible.