Methods for estimating annual average daily traffic

A computer-implemented method for estimating annual average daily traffic for a first epoch for a first road segment comprising:

• providing historical traffic counts for the road segment from a short-term traffic counter from one or more historical epochs which predate the first epoch;
• providing data from a first permanent traffic counter;
• calculating one or more growth factors from the data of the first permanent traffic counter;
• applying the one or more growth factors to the historical short-term traffic counts and converting the historical traffic counts to traffic counts in the first epoch;
• converting the converted traffic counts in the first epoch to equivalent monthly average daily traffic values;
• using the equivalent monthly average daily traffic values to construct a first seasonal traffic pattern for the first road segment;
• finding a matching seasonal traffic pattern, derived from a second permanent traffic counter, to the seasonal traffic pattern of the short-term traffic counting site;
• and
• deriving by a computer, an annual average daily traffic value from the short-term traffic counter of the first epoch using one or more expansion factors from the second permanent traffic counter for the first road segment.