To monitor of noise levels, the equivalent continuous noise level (Leq), the maximum noise level (MaxL), maximum sound pressure level (MaxP) and maximum peak level for the measurement period were monitored. The important parameter for personnel noise exposure is 8h% 70 S.T. Ingle et al. / Transportation Research Part D 10 (2005) 69–75 dose. The percent dose was extrapolated for a period of 8h. 1 The cumulative noise distribution was recorded at intervals of 5dB(A).