Here, enter your estimate of the annual inflation in construction costs.

Since 2000, KDOT construction costs have risen an average of 5.3 percent a year, in line with historical averages. But inflation, historically, is unpredictable - and has been since the turn of the century. From 2000 to 2004, construction costs increased just 3 percent a year; since 2004, the annual inflation rate has been 8.5 percent.