McAdam’s cheap stone crust invented the modern highway
Transport history is mostly a story of inventions that let people and goods go farther. Before engines, international trade already knit a pre-modern world economy; after them, John Loudon McAdam’s soil-and-stone pavements and Ford’s Model T remade everyday distance.
Even simple kit stretched human range: foot coverings, skis and snowshoes let ancient travellers go further. People carrying loads wore the first tracks, which widened into hollow ways and drovers' roads once horses, oxen and donkeys joined in. Animal-drawn carts likely emerged in the Near East some five or six thousand years ago, reaching Europe and India within a millennium or so and China around 3000 BC, and Rome built its famous roads to hold an empire together. From 1500 onward, historians describe a single world economy trading textiles, silver, spices, luxuries and enslaved people across Afro-Eurasia and the Americas.
McAdam's roads of cheap soil-and-stone aggregate were raised a few centimetres above the ground so rain ran off. Cars, beginning in Germany in 1883 and multiplying after Ford's Model T in 1908, demanded harder surfaces against washouts, mud and dust, first cobbles and wood blocks, then tar-bound macadam and concrete. Nottingham's Radcliffe Road became the world's first tarmac road in 1902.
Railways are nearly 500 years old, beginning as wooden tracks where men or horses hauled coal from mines to rivers. Cast-iron plates arrived in the 1760s, later displaced by rolled wrought iron. Richard Trevithick demonstrated his Puffing Devil in 1802, survived a fatal boiler explosion at Greenwich in 1803, and won a 500-guinea wager when his Penydarren engine hauled ten tonnes of iron nearly ten miles to Abercynon in just over four hours; he still died destitute in 1833. George Stephenson's Stockton and Darlington opened in 1825 for minerals, and his Liverpool and Manchester line of 1830 became the first modern railway, carrying passengers and freight.
Britain had about 13,500 miles of line by 1870 and roughly 20,000 by 1914, split among 120 companies that were merged into four groups in 1923. Werner von Siemens opened the first electric tram at Lichterfelde in 1881, and Rudolf Diesel's engine eventually made steam obsolete.
Source: History of transport
