by the Dutch machine building company H.J. Grimbergen B.V. Border station The Border Station is located on embankment No.4, which, with a total area of , is the biggest of all embankments. This artificial island is known as Passport Island or Middle Island. The buildings of King Fahd Causeway Authority and other government Directorates were erected on the Border Station, as well as two mosques, two Coast Guard towers and two tower restaurants. The border station also has extensive landscaping all around the islands in addition to the services and road stations. The Border Station was designed as two connected islands, with the west side designated as Saudi Arabian and the east as Bahraini. The Saudi side of the Border Station has outlets of McDonald's and Kudu while the Bahraini side of the Border Station has a McDonald's outlet. One-stop crossing was introduced on the King Fahad Causeway from 6 March 2017. Under the new system, commuters will only have to stop at one post for passport control, car clearance and customs. The measure will ease travel for commuters and is also expected to ease traffic congestion on the highway as the previous system required multiple stops at Saudi and Bahraini check posts. Expansion On 6 July 2010, Saudi newspapers quoted King Fahd Causeway Authority chief Bader Abdullah Al-Otaishan as saying that the King Fahd Causeway was to undergo a major expansion projected to cost $5.3 million. It was announced that the number of departure lanes would be increased from 10 to 17 and the number of arrival lanes from 13 to 18 on both sides. The renovation includes construction of a commercial center on the Bahraini side. "It will have a number of restaurants, coffee shops, a grocery shop, telephone stalls and a shop to meet travelers’ needs," said Al-Otaishan. "We saw that there was a need for such a center to assist travelers". With points including climate-controlled washrooms and meeting places, the average traveler can be better facilitated. He said work was under way and that the center would be completed by the first quarter of the next year. A Bahraini health center was also being built to serve travelers and causeway staff. "It will feature an emergency room and ambulance to serve whoever is using the causeway — travelers or employees," he said, noting a Saudi health center was also planned for 2011. A security checkpoint near