Of the 25 human factors variables, age, overtaking, overspeeding, neglect of
brake servicing, neglect of tyre care and religious affiliation significantly
contribute to increase in road traffic accidents in the Lagos metropolis.
. Of the two-way variable combinations, 44 human factors variable combinations
significantly contribute to increase in road traffic accidents in Lagos. Among
such are drinking of alcohol before driving in combination with old age;
overspeeding with old age, etc. A total of 32 of the variable combinations
contribute positively while the remaining 12 combinations contribute negatively.
So, we also conclude that second order response surface adequately represent the
accident causation model.