What is the abbreviation for Pre paid electronic toll payment method toll roads bridges?

Looking for the shorthand of Pre paid electronic toll payment method toll roads bridges or how to abbreviate it? We have 5 shorthands for Pre paid electronic toll payment method toll roads bridges.

O-PASS — Pre-Paid, Electronic Toll Payment Method for Toll Roads and Bridges
I-PASS — Pre-Paid, Electronic Toll Payment Method for Toll Roads and Bridges
EZPASS — Pre-Paid, Electronic Toll Payment Method for Toll Roads and Bridges
SUNPASS — Pre-Paid, Electronic Toll Payment Method for Toll Roads and Bridges
E-PASS — Pre-Paid, Electronic Toll Payment Method for Toll Roads and Bridges