I live in Johannesburg. It is a city with virtually no form of efficient public transport. It is fairly large and is a problem to get around without a car. My idea is to implement a modular type of public transportation eg monorail or a surface rail system within a transparent tunnel-like enclosure. This would cover the whole city in concentric tracks with bisecting tracks going out from a single point in the centre. The whole system would be completely automated. The system will...