What are the extensions of the Grand Trunk Road?

The Grand Trunk Road, one of Asia's oldest and longest major roads, has several extensions that connect key cities across the Indian subcontinent. Notable extensions include routes to Lahore and Peshawar in Pakistan, and to Kolkata in India. In India, it also branches into significant highways leading to cities like Delhi and Amritsar. These extensions facilitate trade and travel, enhancing connectivity throughout the region.