What visa application are you applying to extend?
The guideline attached to the application is useful in what you should disclose but it is good practice to be open about your circumstances with all immigration applications.
Should be documented in "Additional Information" section. If you were not disqualified, you shouldnt say you were. Speeding ticket is not a civil penalty issued under UK immigration law. You ought to seek legal advice.
Unfortunately I cannot give advice on the content of your form.