Final answer:
The road surface material patented in 1902 and named after a Scottish inventor is Tarmacadam, commonly known as tarmac. It built upon John Loudon McAdam's earlier macadam surface, later enhanced with tar.
Step-by-step explanation:
The road surface material patented in 1902 that was named after a Scottish inventor is A- Tarmacadam. This material, commonly referred to as tarmac, was named after John Loudon McAdam, who designed the macadam road surface in the 1820s. McAdam's method involved layering crushed stone and allowing it to compact under the weight of traffic. Later, tar was added to the macadam to improve the durability and create tarmacadam. This improvement was patented by Edgar Purnell Hooley in 1902, and the material has been widely used for road construction ever since.
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