The main purpose of this legislation, known as the "Red Light Act," is to prevent states from issuing driver's licenses or identification cards to individuals who are unlawfully present in the United States. The act aims to enforce stricter immigration policies by withholding federal highway funds from states that do not comply with this requirement. Key provisions of the act include a mandate that the Secretary of Transportation will withhold 100 percent of federal highway funds from any state that allows the issuance of driver's licenses or identification cards to undocumented immigrants.