 In Pennsylvania, independent WTVE is licensed to serve Reading even though its primary audience is in Philadelphia.A distributed transmission system now allows it to tailor its coverage area to improve coverage in areas where its signal is currently marginal.In Virginia public television WVPT/WVPY operate a combined total of five additional on-channel synchronised transmitters to fill areas blocked by mountains from two main VHF/UHF transmitters; a set of US$100,000 synchronised digital transmitters can replace service from the same number of conventional analogue broadcast translators and also enable overnight datacasting of instructional materials to the area's 188 schools.