Here is informative content about (electronic speed limiter for A-tractors), written in a clear, educational style suitable for a blog, FAQ, or vehicle information page. Elektronisk spärr för A-traktor: How It Works & What You Need to Know In Sweden, an A-traktor (formerly known as EPA-traktor) is a popular vehicle for young people, typically converted from a passenger car. By law, it must have a maximum speed of 30 km/h . To enforce this reliably, the Swedish Transport Agency (Transportstyrelsen) requires an elektronisk spärr – an electronic speed limiter. What is an Elektronisk Spärr? An electronic speed limiter is a control unit that connects directly to the vehicle’s engine management system (ECU). Its sole purpose is to prevent the A-traktor from exceeding 30 km/h, regardless of how much throttle the driver applies.