The police are not required to read the Miranda rights just because you have been placed under arrest. Unlike the TV cops, the real police only have to read it when you are in custody (not free to leave) and only if the questions they are asking are going to lead you to make an incriminating response. Therefore, general questions about your name, address, and where you are going or coming from are allowed. There are occasionally cases when Miranda rights are never read at all. This is when the police choose not to ask you any questions and therefore there is no need to read it according to the Supreme Court; ones right to remain silent etc. as nothing is being asked of that person.