2. CHALLENGES AND RESTRICTIONS
TEHRAN FACE
โข โAir Inversionโ in cold seasons postpones
air circulation and as a result the polluted
air stays in the lower layers of the air
โข Partial private Operation: government set
s fares, private sector takes all risks
โข Poor availability of Services throughout t
he City
โข Poor Integration with other Public and S
emi-Public services
โข Poor service quality: decreasing patronag
e
โข Low fares: unable to renovate old an poll
uting fleet
โข On board cash payment: revenue losses
โข Weak supervision, monitoring and control