quo·ta
n.
1. A proportional share, as of goods, assigned to a group or to each member of a group; an allotment.
2. A production assignment.
3. (a)A number or percentage, especially of people, constituting or designated as an upper limit: a country with strict annual immigration quotas.
(b) A number or percentage, especially of people, constituting a required or targeted minimum: a system of quotas for hiring minority applicants.

If by "quota" you mean definition 3b, then the cops don't have quotas. There are standards that officers are held to, but there is no set minimum requirement of tickets that officers have to write. They never deny that standards exist but since the standards aren't numerically specific, the cops put a positive spin on it and say "we don't have quotas." Crafty bastards.