Which type of vehicle is specifically exempt from the electric turn signal requirement?

The exemption from the electric turn signal requirement specifically applies to passenger cars manufactured before 1960. This is primarily due to the fact that these vehicles were produced during a time when automatic signaling systems were not standard, and many older models lacked the necessary electrical systems to support such features. When the turn signal law was put into place, these earlier models were given an exception, acknowledging that the technology for electric turn signals was not available or commonplace at that time.

In contrast, trucks, buses, and vans are typically required to have electric turn signals as they were manufactured later and are designed with contemporary safety standards in mind. Having turn signals is crucial for communication on the road, ensuring safer driving practices as these vehicles operate in a variety of environments and conditions. Therefore, the specific exemption for older passenger cars reflects the historical context of vehicle production and safety regulations.