Last time I drove it, there was no toll - probably isn’t now.
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Are you referring to the Causeway or the I-10 crossing?
http://www.thecauseway.us/causeway/tolls.php
Single axle = $3
The I-10 crossing - never went over the causeway and mistook it for the long leg on the main corridor. Thanks for the data - I might ride the causeway next time I'm over that way just to say I did.