Where is the OBU installed?
3 Answers
ETC's OBU is generally installed on the vehicle's front windshield, as long as it does not obstruct the driver's view or interfere with ETC communication. Additional information: 1. OBU is the common name for an electronic tag, used in the highway non-stop toll collection system (ETC). When passing through highways, vehicles equipped with OBU can achieve non-stop toll deduction. 2. OBU consists of an electronic tag and a dual-interface CPU card, installed on the inner side of the vehicle's front windshield. It mainly serves as an information storage card (such as ID information, identity information, attribute information, etc.) for the labeled object (such as vehicles, containers, goods, etc.), and as a communication relay for interacting with DSRC microwave antennas. 3. When using OBU to pass through dedicated lanes, please note: 1. Do not use mobile phones or other radiation-interfering electronic products. 2. At the highway entrance, please choose to enter the ETC lane. If you mistakenly enter or choose a manual lane (including an automatic card dispenser) and have not swiped a non-cash payment card at the entrance but have already received a pass card, you can only use the manual lane at the exit. The driver must return the pass card to the toll collector and can use a non-cash payment card or cash to pay the toll.
As someone who frequently installs OBUs, I've found the best location is at the top of the windshield interior, right near the rearview mirror. That spot offers strong signal reception, doesn't obstruct the view, and makes for simple and convenient installation. For example, after cleaning the glass surface with alcohol, I directly attach the OBU base—it holds firmly and won't fall off on bumpy roads. Positioning it too high or too low isn't ideal; too high might interfere with the roof, while too low on the dashboard could affect airbag deployment—safety first. After installation, check if the signal is working properly and readjust if there are issues. Also, remember not to place it near metal frames to avoid blocking RFID signals; regular dust cleaning can extend the OBU's lifespan. These details ensure smooth ETC passage at toll stations and a more pleasant driving experience.
If you install the OBU yourself, like I've done several times, choose a spot near the top center of the windshield. That area close to the rearview mirror has the right height for stable signals and won't interfere with the dashcam. Before installation, clean the glass to remove grease, wait for it to dry, then firmly attach the OBU. If placed incorrectly, such as near the dashboard, the signal may weaken or the device could fall off—I've seen cases where misplaced OBUs caused ETC failures. Avoid areas near airbags to prevent hazards, and test the OBU's functionality after installation. A higher position collects less dust and is easier to clean. These tips ensure smooth OBU operation with fewer issues.
