I just love how you pick and choose what you want from a single section of the Police Services Act to further your own point. Speed checks are not illegal and are most certainly not misconduct.
Try posting the entire section next time.
42. (1) The duties of a police officer include,
(a) preserving the peace;
(b) preventing crimes and other offences and providing assistance and encouragement to other persons in their prevention;
(c) assisting victims of crime;
(d) apprehending criminals and other offenders and others who may lawfully be taken into custody;
(e) laying charges and participating in prosecutions; (f) executing warrants that are to be executed by police officers and performing related duties;
(g) performing the lawful duties that the chief of police assigns;
(h) in the case of a municipal police force and in the case of an agreement under section 10 (agreement for provision of police services by O.P.P.), enforcing municipal by-laws; (i) completing the prescribed training. R.S.O. 1990, c. P.15, s. 42 (1); 1997, c. 8, s. 28.