An often-quoted example of the effects of the barrier is the Palestinian town of Qalqilyah, a city of around 45,000, which is surrounded almost on all sides by the barrier. One 8 meter-high concrete section of this wall follows the Green Line between the city and the nearby Trans-Israel Highway. According to the BBC, this section, referred to as an "anti-sniper wall," is intended to prevent gun attacks against Israeli motorists on the Trans-Israel Highway.  The city is accessible through a military checkpoint on the main road from the east, and an underground tunnel built in September 2004 on the south side connects Qalqilyah with the adjacent village of Habla . In 2005, the Israeli Supreme Court ordered the government to change the route of the barrier in this area to ease movement of Palestinians between Qalqilyah and five surrounding villages. In the same ruling, the court rejected the arguments that the fence must be built only on the Green Line. The ruling cited the topography of the terrain, security considerations, and sections 43 and 52 of The Hague Regulations 1907 and Article 53 of the Fourth Geneva Convention as reasons for this rejection.