Ticket quotas are barred by law in Texas:
TEXAS TRANSPORTATION CODE, Sec. 720.002. PROHIBITION ON TRAFFIC-OFFENSE QUOTAS.
(a) A political subdivision or an agency of this state may not establish or maintain, formally or informally, a plan to evaluate, promote, compensate, or discipline:
1) a peace officer according to the officer's issuance of a predetermined or specified number of any type or combination of types of traffic citations; or
(2) a justice of the peace or a judge of a county court, statutory county court, municipal court, or municipal court of record according to the amount of money the justice or judge collects from persons convicted of a traffic offense.
(b) A political subdivision or an agency of this state may not require or suggest to a peace officer, a justice of the peace, or a judge of a county court, statutory county court, municipal court, or municipal court of record:
(1) that the peace officer is required or expected to issue a predetermined or specified number of any type or combination of types of traffic citations within a specified period; or
(2) that the justice or judge is required or expected to collect a predetermined amount of money from persons convicted of a traffic offense within a specified period.
(c) Repealed by Acts 2009, 81st Leg., R.S., Ch. 737, Sec. 1, eff. June 19, 2009.
(d) This section does not prohibit a municipality from obtaining budgetary information from a municipal court or a municipal court of record, including an estimate of the amount of money the court anticipates will be collected in a budget year.
(e) A violation of this section by an elected official is misconduct and a ground for removal from office. A violation of this section by a person who is not an elected official is a ground for removal from the person's position.
(f) In this section:
(1) "Conviction" means the rendition of an order by a court imposing a punishment of incarceration or a fine.
(2) "Traffic offense" means an offense under:
(A) Chapter 521; or
(B) Subtitle C.
See
Texas Transportation Code, section 720.002.
I'm not saying ticket quotas don't exist -- I'm saying only that they're illegal.
To combat speed traps, the state legislature has placed caps on the percentage of revenue a city can derive from tickets, and, for certain offenses, part of the fines cities collect is sent to the state.