3.2.1. Land Transport Infrastructure

Land transport can be broadly categorised into roads, railways and metros; a ‘way’ for travel. The word ‘way’ as per Britannica, stems from the Latin ‘veho’ which means, “I carry”, derived from the Sanskrit word, ‘vah’ meaning to “carry, go or move”.

Land transport refers to the systems used for moving people and goods over land. This includes roads, railways, and metro systems. The term ‘way’ indicates a path for travel, originating from the Latin and Sanskrit words for carrying or moving. Understanding these terms helps us appreciate the history and development of transportation systems.

Think of land transport as a network of roads connecting towns and cities, similar to how veins connect different parts of a body. Just as blood travels through veins to keep the body functioning, transportation systems allow goods and people to move efficiently, facilitating trade and commerce.

The generic word ‘road’ used to encompass all land vehicular ways is derived from the Old English word ‘rad’, which means “to ride”. However, the term highway predates it, back to the elevated Romans roads which created a mound in the centre and ditches on the side. It is used to refer to major roadways that connect several rural and urban space and is characterised by various controlled points of entry and exits for traffic.

The term ‘road’ originates from Old English and refers to paths for vehicles. Highways, an older term, denote major roads built by the Romans to facilitate long-distance travel. Roads are classified by their function and connectivity, with highways serving as major connections between cities and smaller roads catering to local traffic.

You can visualize roads like the arteries of a city. Just as arteries carry blood to different parts of the body, roads connect various places, allowing for the smooth flow of traffic and preventing congestion in smaller areas.

Road networks follow a system of hierarchy in their capacity and capabilities. Most roads world over are conventional, undivided two-way; however, there are divided roads such as; expressways, having minor at-grade intersections; freeways, having no at-grade intersections, collectively called motorways in the UK.

Roads can be classified based on their capacity and function. Highways connect larger regions, while arterial roads manage traffic from adjacent areas. Local streets are smaller, serving only nearby properties. Understanding this hierarchy is crucial for urban planning and traffic management.

Imagine a funnel. When pouring liquid into it, the wider top represents highways, allowing a lot of traffic to enter, which then narrows down to the smaller end representing local streets, where traffic slows down and is more concentrated.

The earliest records of animal trodden paths used by man have been dated back to 6000 BCE, with evidence on first constructed road dating 4000 BCE at Ur, present day Iran. Oldest existing paved road, made of layers of sandstone bound by clay-gypsum mortar with two rows of basalt slabs in the centre for use by foot, while the dipping edges were for animals, was built by the Minoans on the island of Crete.

The history of roads dates back thousands of years, indicating the evolution of human travel and trade. Roads have been key in connecting civilizations, from simple paths used by animals to constructed roads linking empires. These developments enhanced commerce and communication.

Think of the development of roads like building a bridge over a river. Initially, animals may have crossed on stones, but as populations grew and trade flourished, proper bridges were constructed to facilitate smoother movement over obstacles.

Road design is an exceedingly important aspect of national and regional planning, especially in the context of urban connectivity and the population, commerce, industry and transportation needs of the community. Estimating traffic on a route as well as conducting civil surveys to establish the site conditions are integral to successful road system planning and design.

In modern contexts, road design involves careful planning to accommodate vehicle volume and ensure safety. Traffic estimates and surveys help engineers provide the necessary infrastructure to support both current and future demands.

Imagine planning a large party; you would want to know how many guests are coming to ensure there is enough space and food. Similarly, city planners estimate traffic to determine how wide and how many roads are needed to safely accommodate the flow of vehicles in an area.

In earlier chapters, we have discussed the oncoming of railways. The role civil engineer is pivotal for railway transport infrastructure, and encompasses surveying for a new line, construction and maintenance of the line, ensuring longevity, safety and reliability of the structure.

Railways have evolved significantly, with civil engineers ensuring that new lines are planned, constructed, and maintained for safety. Their work covers everything from the physical tracks to the associated structures, making them essential for efficient transportation.

Consider a train track as a carefully laid foundation for a house. Just like builders ensure the foundation is sturdy and level to support the house above, civil engineers make sure railway lines are installed correctly to safely support the trains that run on them.

--