. COMPUTATIONS
This study set out three major variables affecting the
total number of RA. The explanatory variables express
in the model are registered vehicles (RV), road length
(RL) and population (PO). These three major variables
are assigned as independent variables and RA as
dependent variables. The historical data of RA, RV, RL
and PO from the year 1974 to 2007 were employed as
input data.
The variables of the model are positioned in such way
that it fulfils requirement of linearity. Correlation
coefficients of variables are calculated for each
explanatory variable separately in order to determine the
best fit variable among these variables. Strength of
relationship among the variables is presented in Table I