Here the police will have a firm, uncompromising policy or position.They will not take any excuses from speeding motorists even if they say it was an emergency.

This could be as Monica describes, but to me it is more likely to mean that the police will be more rigorous in enforcing the law - in other words, a speeding driver will be more likely to be stopped by the police - not necessarily that they will receive a more severe punishment.

This means that the police are going to punish speeding motorists more severely.