a section of a transmission or pipeline right-of-way that extends from the wire or pipe zone to the right-of-way edge. The border zone is managed to promote a low-growing plant community of forbs. tall shrub . and low-growing trees below a specified height (e.g.. 25 ft or 7.5 m).

border zone (Wikipedia)

Border control refers to measures taken by governments to monitor and regulate the movement of people, animals, and goods across land, air, and maritime borders. While border control is typically associated with international borders, it also encompasses controls imposed on internal borders within a single state.

As seen from the Bhutanese side
As seen from the Indian side
The border gate between Phuentsholing, Bhutan and Jaigaon, India
The gate that borders East Nusa Tenggara in Indonesia and East Timor
A train crossing the China–Russia border, travelling from Zabaykalsk in Russia to Manzhouli in China
Different categories of borders have varying features and levels of security

Border control measures serve a variety of purposes, ranging from enforcing customs, sanitary and phytosanitary, or biosecurity regulations to restricting migration. While some borders (including most states' internal borders and international borders within the Schengen Area) are open and completely unguarded, others (including the vast majority of borders between countries as well as some internal borders) are subject to some degree of control and may be crossed legally only at designated checkpoints. Border controls in the 21st century are tightly intertwined with intricate systems of travel documents, visas, and increasingly complex policies that vary between countries.

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