Public transport systems can be improved by focusing on customer needs rather than technology or existing operators. The most effective systems prioritize public transport, integrate different modes, and plan frequent services on a full network. While metro and heavy rail require large subsidies, bus rapid transit (BRT) provides high capacity at a fraction of the cost, constructing over 400km of BRT for the price of 7km of subway. BRT is also faster to implement, requiring under 18 months compared to over 5 years for metros.