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Health systems have fallen short of reaching many in the rural interiors and remote corners, some of which have no motorable roads.

She and Sue had reached the highest point on one of the highest motorable roads in the world, in the Ladakh region of northern India, and were alone for the first time.

As he pedaled toward the top of Khardung La on the world's highest motorable pass, he remembered the words of his wife and 9-year-old daughter: "You must complete this mission."

Stretching from Alaska to the pencil tip of Argentina, the 48,000km-long Pan-American Highway holds the record for the world's longest motorable road.

Here too, houses had mushroomed, and it was only the fact that they nestled under trees, and that the narrow paths that branched off the main road and led to them were not motorable, that gave Ayemenem the semblance of rural quietness.