Investigating the contribution of road geometric design towards road accidents
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Road safety has become a major concern affecting countries' socio-economics. According to the world health organization (WHO, 2003) statistics, there are approximately 1.25 million fatalities and 20 to 50 million who are seriously injured due to road accidents. Road geometric design elements which have been investigated to influence road accidents include lane width, shoulders, lane number, road curve radii and road gradients. This is due to the interrelations between geometric design elements with each other and with other road accident factors. However, limitations have been encountered through raising shoulders and walkways and strengthening road safety policies through laws to overcome the challenge.