BAI Reader Location continued
The maximum vehicle speed for BAI readers is 25 mph. With the reader mounted 40' from the
gate, drivers may pass by faster than 25 mph, resulting in reading problems. If a vehicle does
not read due to excessive speed it will have to stop at the gate, which does not open, before
recognizing the failure. Now it is necessary for the vehicle to back up to the reader and try
again, which may be difficult and is certainly hazardous to incoming traffic.
The second problem with mounting the reader 40' from the gate is having multiple vehicles
between the reader and gate. At least three vehicles will fit into the 40' space, so let's
suppose that three vehicles in a row pass the reader but only two have barcode decals.
Because nothing stops the vehicles until they reach the gate, it will be impossible to tell which
of the three vehicles are valid and which is unauthorized.
Also, it will not be difficult for an unauthorized vehicle to wait right in front of the gate for a
valid car to pass the reader. The gate will then open for the unauthorized car and close before
the valid car can enter. This results in a valid resident sitting outside the gate, who will have to
either back up to the reader or wait for another valid vehicle to open the gate.
Advantages of mounting reader the recommended 25' from gate:
● Traffic will naturally slow to a safer speed as vehicles approach the closed gate
● Decals applied to the rear side windows are in a position to read reliably but have
minimal impact to driver sightlines and are less noticeable on the vehicle
● When a vehicle is read, it will always be the one directly in front of the gate
● Traffic flow will be steady, vehicle speed will be determined by how quickly the gate
can cycle
Disadvantages of mounting reader closer to gate (10'):
● Traffic will slow to a crawl as vehicles inch toward the gate, hoping for the decal to read
● Decals applied to the rear side windows will not read – instead, decals must be
relocated to the front side windows, where they may interfere with driver sightlines and
will be much more noticeable on the vehicle
● Vehicles will be tempted to “tailgate” each other through the gate out of frustration
Disadvantages of mounting reader farther from gate (40'):
● Traffic will naturally pass the reader faster and maintain a higher speed through the
gate, leading to increased risk of accidents and injury
● Vehicles passing the reader too fast will not read reliably
● If a vehicle fails to read due to excessive speed it will be difficult and hazardous to
back up and try again
● If multiple vehicles pass the reader, it will be impossible to tell which are valid
● Vehicles moving faster will be tempted to “tailgate” through rather than stop, possibly
resulting in the gate closing on vehicles
Ver. 1.8 Barcode Automation, inc 800-528-9167 FAX: 407-327-6172 13
(28 paginas)
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