  In a city of right moving and upmoving cars with hardcore constraint, traffic
jam occurs in the form of bands. We show how the bands are destroyed by a small
number of strictly left moving cars yielding a deadlock phase with a rough edge
of left cars. We also show that the probability of waiting time at a signal for
a particular tagged car has a power law dependence on time, indicating the
absence of any characteristic time scale for an emergent traffic jam. The
exponent is same for both the band and the deadlock cases. The significances of
these results are discussed.
