Can ETC Be Used When Covered by Film?

2 Answers
Ryan
07/24/25 3:04am
In general, applying film will not affect the use of ETC. The film on the front windshield does not interfere with the ETC device and can provide heat insulation and sun protection. The film effectively blocks the heat generated by infrared rays and can also block ultraviolet rays. Medium and long waves of ultraviolet rays can penetrate thick glass, but applying heat-insulating film can block most of the ultraviolet rays. Here are some related introductions: 1. Benefits of applying film: It has safety and anti-explosion properties. The base layer of the film is polyester film, which has a strong anti-penetration function. Combined with the adhesive layer of the film, it can effectively prevent injuries caused by broken glass to drivers and passengers. It can create a private space. If the right type is chosen, the film makes it difficult to see inside the car from the outside while allowing clear visibility from inside the car, ensuring privacy and safety. 2. Introduction to the use of ETC: According to the regulations of the national and Shandong expressways, ETC cards cannot be used solely as electronic wallets. This means that when driving on expressways, the ETC card can only be used for payment at the exit if it has been used to record the entry information at the toll station. If a pass card is taken at the entrance, the ETC card cannot be used for payment at the exit.
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LaCorey
08/10/25 10:40pm
I've worked with small car devices before, and ETC relies on radio frequency signals to function, somewhat similar to wireless internet. The signal needs to transmit from the device to the toll station equipment. If the film completely covers it, especially sunshade films with high metal content, the signal gets blocked, potentially failing to detect the toll gate, leading to payment failure or alarms. This is no small matter—suddenly getting stuck at a toll booth while driving not only wastes time but also affects safety. I recommend choosing a well-ventilated spot for ETC installation, like the gap near the rearview mirror, and avoiding film coverage. Before applying film, it's best to consult the service point and try thinner, metal-free films. If it's already covered, promptly relocate the device or replace the film—don't wait until issues arise to fix it. Regularly check the area around the device to ensure it's clean and unobstructed, fostering good habits for smoother travel.
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