Translation of fluir in Spanish-English

There were no lights on the highway and hardly any cars, but quiet a few motorcycles and funnily pedestrians walking on the emergency lane. There was a tropical atmosphere in the air, I liked it.
Last week for example, I could have told you in advance that there is no chance for the other trials (if I knew): The traffic on the major website was too big. We should test it again sometime.
We checked in, took a refreshing hot shower and were really happy about our accommodation. As it was late, we took another ride to some restaurant. When we payed the driver he told us that he had no change.