I don't know about Tarzania but in Toronto the subject of licencing cyclists have been studied many times in previous decades. The costs of administration will surely turnoff those who are already skeptical about government bureaucracy and overspending. In several similar threads in this same forum, I had suggested that 8 hours of on road bicycle experience is required for a driver's licence. Secondly, check your auto insurance. There may be coverage for collisions on a bicycle.