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European route E40 is the longest European route, [1] more than 8,000 kilometres (4,971 miles) long, connecting Calais in France via Belgium, Germany, Poland, Ukraine, Russia, Kazakhstan, Uzbekistan, Turkmenistan, and Kyrgyzstan, with Ridder in Kazakhstan near the border with Russia and China.
Sometimes similar signs have minor differences in meanings, following the local traffic codes. For example, the Irish "rural speed limit" sign for local tertiary roads takes the appearance of that used to denote the end of all previously signed restrictions used elsewhere in Europe. However this sign, which is always accompanied with a "SLOW ...
An example of the Landolt C eye chart (also known as the Japanese eye chart.). Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16]
Distance PD is the separation between the visual axes of the eyes in their primary position, as the subject fixates on an infinitely distant object. [2] Near PD is the separation between the visual axes of the eyes, at the plane of the spectacle lenses, as the subject fixates on a near object at the intended working distance. [3]
Some clinics do not have 6-metre eye lanes available, and either a half-size chart subtending the same angles at 3 metres (9.8 ft), or a reversed chart projected and viewed by a mirror is used to achieve the correct sized letters. In the most familiar acuity test, a Snellen chart is placed at a standard distance: 6 metres.
Map of European long-distance paths E3. The E3 European long distance path, or just E3 path, is a 6,950-kilometre (4,320 mi) long-distance footpath that is planned to run from the Portuguese coast to the Black Sea in Bulgaria. It is one of the network of European long-distance paths.
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This is an accepted version of this page This is the latest accepted revision, reviewed on 20 December 2024. Directionality of traffic flow by jurisdiction Countries by direction of road traffic, c. 2020 ⇅ Left-hand traffic ⇵ Right-hand traffic No data Left-hand traffic (LHT) and right-hand traffic (RHT) are the practices, in bidirectional traffic, of keeping to the left side and to the ...