What is the No Entry Sign (Girilmez Levhası)?\n\nThe No Entry sign is a regulatory traffic sign characterized by a solid red circular background and a thick, horizontal white bar across the center. Under the Turkish Highway Traffic Regulation managed by the General Directorate of Highways (KGM), this sign is officially designated to prohibit entry to all motor vehicles from the side of the road where the sign is posted. It indicates that the street ahead is designed for one-way traffic flowing towards the driver, meaning vehicles are allowed to exit from this street but cannot enter it from your current position.\n\n## Why the No Entry Sign Matters in Traffic Safety\n\nThe primary purpose of the 'Girilmez' sign is to prevent head-on collisions and organize the safe flow of urban and highway traffic. You will most commonly encounter this sign at the exits of one-way streets, at the exit ramps of high-speed motorways, and at designated lanes reserved for public transit or emergency vehicles. Disregarding this sign can lead to catastrophic accidents, particularly on high-speed Turkish expressways where drivers exiting a service station or toll booth might mistakenly attempt to enter an exit ramp.\n\n## Key Exam Scenarios on the MTSK Theory Test\n\nOn the Turkish driving theory exam (ehliyet sınavı), questions featuring the No Entry sign often test your situational awareness and understanding of right of way. A common question format presents a diagram of an intersection where one of the roads has a 'Girilmez' sign, and asks which direction a numbered vehicle is legally allowed to turn. You must remember that turning into a road marked with this sign is always prohibited, even if your GPS or other drivers attempt to do so. Additionally, the exam may ask you to distinguish between this sign and the 'Road Closed to All Vehicular Traffic' sign (which is a simple red ring with a white background and no bar), so pay close attention to the visual differences.\n\n## Penalties and Enforcement in Türkiye\n\nUnder Turkish traffic law, driving past a No Entry sign is considered a serious traffic violation. It carries a heavy administrative fine and adds negative penalty points to your driver's license record. If an accident occurs because a driver entered a one-way street against a 'Girilmez' sign, that driver is almost always held fully liable (asli kusurlu) for the collision due to a direct violation of basic traffic rules.