Reasonable grounds for arrest is also known as probable cause.
Reasonable grounds for arrest or probable cause is when the facts and circumstances, which would lead a reasonable person to believe that a crime has been committed or is being committed or is about to be committed.
What this means is that for an arrest to occur the police must have more than just a hunch or suspicion and there has to be specific evidence or observations which would convince a reasonable person of a crime's commission.
The evidence has to be sufficient to convince a reasonable person that a crime has been or is being committed and the police officer must also be able to point to specific factors or observations which support the belief that a crime has been committed before the police can make an arrest.
Probable cause for arrest requires more concrete evidence than reasonable suspicion, which is the standard for brief detentions and investigations.
And the fourth amendment to the US constitution also protects against the unreasonable searches and seizures, which means the police must have probable cause before making an arrest or conducting a search or obtaining a warrant in most situations.
Police also have to have reasonable suspicion or see you committing a traffic violation or know you committed a crime to perform a traffic stop.
A cop or police officer cannot pull you over just to check your license or even your registration unless the cop or police officer has a reasonable suspicion or probable cause to believe that you're actually violating the law.
A cop or police officer cannot randomly stop someone for the sole purpose of checking drivers licenses or registration as doing so is considered unconstitutional.
For a cop or police officer to initiate a traffic stop they have to have reasonable suspicion that you are violating the law or have seen you violating a traffic offense.
Although if someone reported your vehicle as being involved in committing of a crime and the police spot your vehicle and your tag number matches the description the police or cop can pull you over.
But if a police officer or cop knows your license is suspended already and they see you driving the police officer or cop can pull you over then even if you didn't commit any other traffic violations.
The cop or police officer can use their knowledge of your license status being suspended, including the status of your license being obtained through license plate scans or other means as a reasonable suspicion for a traffic stop.
Police have to have reasonable suspicion to perform a traffic stop on you, which means that the police need more than a hunch, but not always necessarily enough evidence for probable cause.
The police have to have a justifiable reason, which is reasonable suspicion or probable cause to make a stop on a vehicle which means that the police have to have specific and articulable facts that when taken together with rational interference's from these facts, lead the police to reasonably suspect that a crime has been committed or is being committed or about to be committed.
Random traffic stops without any probable cause or reasonable suspicion or often illegal.
If the police or cop knows that your license is suspended such as through a license plate check or from a previous interaction with you and they see you driving then that alone can be the basis for reasonable suspicion which allows the police to pull you over.
Driving with a suspended license is a violation of the law and can result in jail time, fines and further suspension of your drivers license.
The police may also impound the vehicle if it's registered to you and you have a suspended drivers license.
Driving on a suspended license will get you arrested if caught but driving on an expired license which is different may just get you a ticket or a warning.