There's still time before the summer season ends and the asphalt plants close for the City of Danbury to do paving work.  Drivers along Clapboard Ridge Road will also see that the state has finally paved the street.  This week, crews started road improvements on Highland Park Drive, Stuart Drive, Elmar Drive, and Hensel Drive-- all off Clapboard Ridge Road.  Public Works Director Antonio Iadarola noted that the Saw Mill paving project ate up a lot of the budget, but depending on asphalt prices, and how much is left, they could move further down the large list of prioritized projects.  But Mayor Dean Esposito noted that materials are petroleum-based and the prices keep going up.  Iadarola added that the drainage work that goes with paving is also higher than last year.  Piping is 40-percent higher than it was a year ago and he says all of the catch basin tops, concrete work, and curbing drive the price through the roof.