Click here for more info. - Please read this before you send me any e-mail, or ask me any questions! Instead, each state has laws regarding the use of these devices. Manitoba:Radar Detectors in Manitoba: Radar detectors are illegal to use in Manitoba. While you shouldnt use radar detectors to help you drive at unsafe speeds, they can be handy tools that can save you lots of money in tickets and insurance prices. 1. Dashcams and radar detectors are prohibited in California if they obstruct the driver's view. the latest laws by doing this very tedious research THEMSELVES. Laser Jammers in Texas: Laser jammers are banned for use in Texas. Possession and use of radar or laser jamming devices prohibited.