Dressed in black and with their faces covered, they demanded the release of political prisoners.
At least nine cubic meters of dirt covered the man at the Bosques de Santa Fe golf club.
The systems will be established randomnly and the vehicles will be confined to a single lane in which the exhaust gases will be measured.
Vehicular chaos is expected to ensue.
In July 2015, two years after Uber Technologies Inc entered Mexico City and upset taxi unions, the city government announced a deal to allow Uber and rivals such as Cabify to legally operate.
The global event is designed to raise awareness of road safety for bikes.
This measure will be announced next week, according to Journalist Carlos Loret de Mola.
Miguel Ángel Mancera explained that those who request to renew their permits will have to opt for less polluting alternatives.
The emergency services also reported a tree felled in the south.
The second concert will be held on September 29 at Foro Sol.