 Tolls at the Dover and Biddles Corner mainline toll plazas were originally $ 1 the whole week . On October 1 , 2007 , tolls on weekends were increased to $ 2 in order to fund statewide transportation projects . Commercial vehicle tolls also increased by $ 1 on weekdays and $ 2 on weekends at this time . On August 1 , 2014 , the weekend tolls at Dover and Biddles Corner increased to $ 3 in order to again provide funding to transportation projects across the state . 
