Vehicles manufactured in what year or later must have a non-glare indicator for multi-beam systems?

The correct answer indicates that vehicles manufactured in 1948 or later are required to include a non-glare indicator for multi-beam headlight systems. This regulation is essential for road safety, as it helps prevent glare from the headlights of oncoming vehicles. A non-glare indicator serves as a visual cue that informs drivers when their high beams are activated, thereby encouraging them to switch to low beams when other vehicles are present. This feature is critical in reducing the potential for accidents caused by temporary blindness from bright lights, ensuring a safer driving experience for everyone on the road.

The year 1948 was significant in automotive regulation because this was around the time when transportation authorities recognized the increased need for safety features in vehicles as more cars began to populate the roads. Implementing a non-glare indicator was one of the steps taken to enhance nighttime visibility while simultaneously protecting the safety of all road users.

This regulatory development would not have been applicable to vehicles made before 1948, as the standards for lighting and headlight systems were less advanced during those earlier years. Thus, it was in 1948 when the push for more safety-conscious features such as non-glare indicators began to take shape in vehicle manufacturing standards.