The largest city of Pakistan is the most neglected mega-city in the world, in terms of urban public transport systems and the basic reason for this is the government's apathetic attitude towards the revival and expansion of the surface rail-based urban transport public system, the Karachi Circular Railway (KCR). Nowhere in the world is there a concept of a viable urban public transport system without rail-based systems, whether they be surface, underground, tube or metro. If we take the example of Mumbai, the fifth largest city in the world in terms of area, according to Wikipedia, every day some 6.9 million people commute by the local train system. To cater to the needs of Mumbai commuters, the Suburban Railway system, rightly called the lifeline of Mumbai, runs 2,342 local train services every day. Karachi, on the other hand, is the 20th largest city in the world by area and according to Wikipedia's ranking, it has the highest population density in the world, 10,727 people per square km, while the largest city of the world, Tokyo, has a population density of only 4,049 and even Mumbai has only 8,170 people per square km. Sadly, KCR has only four local trains, catering hardly to a few thousand of the total population of over 18 million. Experts say that high residential-population densities and exceedingly large central business districts are the main factors for the success of any urban rail-based transport system. Karachi is a booming success in these characteristics, having the highest population density in metropolitan areas and a fairly large central business area. There is no reason why a rail-based public transport system can not be run profitably in Karachi, a city with both a high population density and vast business localities. This is why the KCR, after its inauguration half a century ago, was a profitable service during its initial years before the nexus of road-based transport lobbies and corrupt officials gradually pushed it to doom. Public transport is considered an important issue in the whole world, socially, economically, environmentally and most importantly politically, because commuters are voters and no political party or political government can afford to antagonize this important section of the population, especially in highly educated urban areas. It is a pity that in Pakistan, this urban commuter's vote is taken for granted by both the government and the political parties. Economically, urban public transport is considered an important factor for industrial and commercial productivity. Saving commuting time means saving precious production hours of industry and trade. In Karachi, the national hub of trade and industry, the present slow-moving, inefficient and unreliable public transport system is a curse. If the labor wastes even one hour a day for the lack of sitting or standing space in overcrowded buses and minibuses, it means an incalculable loss of hundreds of thousands of production hours to industry and commerce, costing employers millions of rupees a day. It is said certain political quarters are not in favor of the revival of the KCR and are instead interested in introducing some