CLEM7 traffic has slumped 11 per cent since receivers were appointed to the beleaguered tunnel in February.
The number of vehicles using the tunnel has dropped from a Friday average of 31,748 in February to 28,244 this month, a slump of more than 3500.
Friday is typically the most popular day for motorists using the Clem7.
The biggest contributor to the declining number of vehicles is most likely the toll, which was increased from April 4 to $3.95 per car, up from the heavily-discounted $2 a journey.
The highest number of vehicles using the Clem7 tunnel was in September 2010, which recorded a Friday average of 33,068.
That means there are almost 5000 fewer vehicles each day - 4824 - using the tunnel now than there were last September.
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