You may now download the English version of the popular Dutch dB(A) road and rail traffic noise program.
Although the method is valid and well calibrated for the Dutch situation, conditions may very well differ in other countries.
Caveat Emptor! (Which means: let the buyer beware. And now you don't pay, even more so)
With the latest version VLG version 6.1 augustus 2003 cumulative quality of noise exposure can be calculated. Help file is included in the .ZIP (==77 K)