DRIVERS using toll roads have dropped by 33.6% in the last seven years.
Numbers have declined year-on-year from a record daily average of 23,909 vehicles in 2006.
It comes as the toll road network increased from 1,7233 to 2,568km.
The decline between 2012 and 2013 was 4.9%, with the average number of vehicles using the toll roads slipping to 15,864 per day, according to the Ministry of Development.
The R-2 Madrid-Guadalajara ring road suffered the most significant drop, losing 22.5% of traffic, and now an average 4588 vehicles use the road daily.
The government is looking into bailing out the network operators in a deal which will grant them an 80% share in the companies.