![]() ![]() The tag is read by scanners as far as 31.5 feet (9.6 m) at 915 MHz, and the tag features a 2048-bit read/write passive memory. In addition, the tags support ANSI INCITS 256-2001 and ISO 10374. The protocol used in Houston is ATA for automatic equipment identification however, a driver in Houston can conceivably use the tag in another state where the other protocols are used. The new tag uses three different protocols, or communications methods, with the tag readers-ATA, eGo and SeGo. As such, some toll patrons attempt to hold up their sticker tags when driving through the toll lanes, and appear mystified when they do not work as their old tags did. These characteristics are much different compared to the old battery tags, which would read fine if not mounted properly. This range reduction is so much that not having a tag properly mounted will result in it not reading at all in toll lanes. The tag also relies on the windshield for an amplification effect, and its effective range is greatly reduced if it is not mounted on a glass substrate. ![]() Removing the sticker after placement has a high probability of either separating the chip from the antenna, de-tuning the antenna from its designated frequency, or both, therefore invalidating the tag for future use. The battery tag's $15 security deposit can be applied to the purchase of the sticker tag. These new tags are sold, rather than rented, so they help save money over the life of the tag by eliminating the monthly $1 rental fee. ![]() Instead of battery-powered radio transmitters, the new tags are adhesive stickers with a button-sized microchip in the middle of, and a reflective antenna system throughout the tag. In May 2006, HCTRA introduced a new version of the transponder tag. New transponder The fronts of the newer tags, oldest to newest, left to right The rears of the new tags, oldest to newest, left to right The personal information about the EZ TAG customer is not compromised in this process because the EZ TAG database and the AVI system are not interconnected. By tracking the movement of individual transponder tags (EZ TAG user vehicles) over the city, the system can generate real time traffic information for use by the general public. Houston Transtar uses EZ TAG sensors, which are placed at numerous points across Greater Houston, for their Automatic Vehicle Identification (AVI) traffic monitoring system. Finally, when passing through a toll plaza, the driver chooses lanes specially equipped with sensors that can read EZ TAG transmitters and deduct the appropriate amount from their accounts. Next, the customer receives a small, white radio frequency transponder which must be affixed to the inside of their windshield behind their rear view mirror. To participate, a driver signs up through the EZ TAG website, via telephone, or at one of the store locations. How it works An older EZ TAG The inside of an older EZ TAG As of late 2003, the EZ TAG can also be used on all lanes of tolled roadways in Texas that accommodate electronic toll collection. Motorists with the tags are allowed to use lanes reserved exclusively for them on all Harris County Toll Road Authority (HCTRA) roads. Current EZ TAG design as of 2017ĮZ TAG is an electronic toll collection system in Houston, Texas, United States, that allows motorists to pay tolls without stopping at toll booths. Not to be confused with E-ZPass or EasyTag. ![]()
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