Officials say the final sites will be selected to maximize revenue and minimize the number of cars seeking alternative routes.
They're also touting a plan to limit how many local drivers will have to pay tolls. The proposal would let passenger vehicles with E-ZPass transponders go through the first toll plaza for free.
A decision about exactly where to put the nine tolling plazas is expected sometime this fall.
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On the Net:
I-80 tolling: http://www.paturnpike.com/I80/tolling/tolling.aspx