In Utah, all street-legal all-terrain vehicles must be equipped with an illuminated speedometer. This is critical because it allows the operator to monitor and control their speed effectively at all times, ensuring they remain within legal speed limits. An illuminated speedometer is essential for safety and compliance with traffic regulations since it provides critical information visibly and continuously, regardless of lighting conditions. Being able to clearly see the speedometer helps riders maintain appropriate speeds, reducing the risk of accidents and receiving traffic fines. This requirement emphasizes ensuring street-legal vehicles can operate safely and in adherence to traffic laws, which aim to protect all road users.