Can ETC be installed in the black area of the windshield?
4 Answers
ETC devices should not be installed in the black dotted area of the windshield as it affects normal operation. Installing ETC in the black dotted area has drawbacks, mainly weakening the solar charging capability of the device, which may lead to power depletion over time. Additionally, it's important to ensure that the ETC installation does not obstruct the driver's view. The optimal placement is directly behind the rearview mirror inside the vehicle, ensuring both functionality and aesthetics. For passenger cars, the ETC is typically installed in the upper middle section of the windshield, while for large vehicles like trucks and buses, the installation position is in the lower middle section. The suitable installation height ranges between 1.2 meters and 2.5 meters, with an installation angle between 30 to 90 degrees. For vehicles with factory-installed or aftermarket anti-explosion films, which may interfere with microwave signal transmission, the ETC should be installed in the microwave window strip area. Here are key considerations for ETC installation: Avoid obstructing the driver's view, best installed behind the rearview mirror: Many vehicle models have windshields with significant rearward inclination, which can reduce the driver's field of vision. Installing the ETC without considering this may increase blind spots. Placing it on the right side behind the rearview mirror helps avoid view obstruction. Ensure uninterrupted charging: ETC electronic tags consume power but generally don't require manual charging or battery replacement as they feature a built-in solar panel for self-charging. Therefore, avoid installing in the windshield's black areas or positions that might shade the solar panel. Do not remove once installed: The adhesive backing contains an anti-tamper rod connected to a switch. When properly installed, the windshield presses this rod in. Removing the device causes the rod to pop out, triggering the switch and locking the tag, requiring an ETC service center visit for reactivation. This mechanism prevents multiple vehicles from sharing one device. ETC usage notes: The ETC transaction sensing range is 8 meters. Maintain at least 10 meters distance from the vehicle ahead to prevent erroneous charges if their ETC malfunctions. ETC lanes recognize vehicles at speeds up to 20 km/h; excessive speed may cause read failures. For debit card-linked ETC, insufficient balance will also result in failed transactions.
When installing my ETC device, I also considered placing it in the blackened area of the windshield for a more discreet look. However, I soon discovered frequent signal interruptions and frustrating read failures at toll booths. After some research, I learned that the black area is actually a sunshade strip with a ceramic coating that blocks ETC's radio signals, preventing proper operation. The correct position is the upper center of the windshield near the rearview mirror - this transparent area provides unobstructed signal transmission. Since repositioning it there, I've had zero issues. I recommend cleaning the surface with alcohol before installation to ensure strong adhesion, unlike my initial rushed attempt. Regular checks for loosening are also crucial to avoid problems on highways.
From a technical perspective, installing ETC in the black area is not ideal. That black section is called the frit band, which contains ceramic particles that may block RF signals. ETC operates using wireless technology similar to Bluetooth and requires a clear path to the toll station antenna. If obstructed, weakened signals can cause read failures or even damage the device. During installation, choose a clean area near the rearview mirror without coatings or films to ensure reliable communication. I've seen cases where incorrect placement resulted in manual processing at every toll station, wasting time. Carefully reading the manual is crucial—it typically specifies avoiding the black zone. Testing the installation point is simple: after placement, drive through a toll station to verify smooth operation.
Safety first, incorrect ETC placement can pose risks. If installed in the black shaded area, signal interference may cause toll station recognition failure, potentially leading to congestion or accidents. I've encountered similar situations where a friend got stuck at the entrance, which was quite dangerous. It's advisable not to take risks and install it near the rearview mirror as per standards to ensure stable device operation. When installing, clean the glass surface to prevent dust from affecting adhesion. ETC failure during high-speed driving can distract attention and increase safety hazards. Following manufacturer guidelines is the safest approach to protect yourself and others. Regular maintenance checks are recommended to prevent loosening or detachment.
