Data: http://opendata.bcn.cat/opendata/en/catalog/TRANSPORT/trams/
<road section identifier>#<date plus the hour, minutes and seconds>#<current status>#<expected status in 15 minutes>
status (0 = no data, 1 = very fluid, 2 = fluid, 3 = dense, 4 = very dense, 5 = congested, 6 = closed).