Amilestone is a numbered marker placed on a route such as aroad,railway line,canal orboundary. They can indicate the distance to towns, cities, and other places or landmarks likemileage signs; or they can give their position on the route relative to some datum location (azero milepost). On roads they are typically located at the side or in amedian or central reservation. They are alternatively known asmile markers (sometimes abbreviatedMMs),mileposts ormile posts (sometimes abbreviatedMPs). A "kilometric point" is a term used inmetricated areas, where distances are commonly measured inkilometres instead ofmiles. "Distance marker" is a generic unit-agnostic term.
Milestones are installed to providelinear referencing points along the road. This can be used to reassuretravellers that the proper path is being followed, and to indicate eitherdistance travelled or the remaining distance to a destination. Such references are also used by maintenance engineers and emergency services to direct them to specific points where their presence is required. This term is sometimes used to denote a location on a road even if no physical sign is present. This is useful foraccident reporting and other record keeping (e.g., "an accident occurred at the 13-mile mark" even if the road is only marked with a stone once every 10 miles).Distance markers are typically written only tointeger values (sometimes with a singlesignificant figures), often with theunit name or symbolbefore the number, as in "milex" or "kilometrey", for example, "mile 317" or "kilometre 510".[a]
Miliarium (Classical Latin:[miːllɪˈaːrɪ.ũːˈau̯rɛ.ũː]) were originallystoneobelisks – made fromgranite,marble, or whatever local stone was available – and laterconcrete posts. They were widely used byRoman Empire road builders and were an important part of anyRoman road network: the distance travelled per day was only a few miles in some cases.[citation needed] Many Roman milestones only record the name of the reigning emperor without giving any placenames or distances.[1] The first Roman milestones appeared on theAppian Way. At the centre of Rome, the "Golden Milestone" was erected to mark the presumed centre of the empire: this milestone has since been lost. The Golden Milestone inspired theZero Milestone in Washington, D.C., intended as the point from which all road distances in the United States should be reckoned.Odometers were used to measure the Roman milestone spacing, most likely based onAncient Greek technology.[citation needed]
A mile-marker monument, theMilion, was erected in the early 4th century AD inConstantinople. It served as the starting point for measurement of distances for all the roads leading to the cities of theByzantine Empire, and had the same function as theMilliarium Aureum ofAncient Rome. The Milion survived intact until at least the late 15th century. Its fragments were discovered again in the late 1960s. A fragment is re-erected as a pillar.
In Islamic civilisation, use of milestone began in the first Islamic century. The Umayyad caliph Abd al-Malik bin Marwan laid the milestones along the paths that travelers used, and some were found in the city of Faiq in the Syrian Golan, which is, Faiq, one of the main road stations throughout the Islamic ages. The function of these stones was to guide travelers and introduce them to long distances, as the separation between one and the other was one mile. Many of these stones were found in more than one location, one in the Islamic Archeology Museum in Istanbul and another in the Jerusalem Museum. A translation of the text written on the stone currently found in the Kasserine Museum in the Golan reads as follows:
In the name of God, the Most Gracious, the Most Merciful.
There is no god but God alone, and there is no partner for it. Muhammad is the Messenger of God.He ordered the making of these miles, Abdul Malik bin Marwan, Commander of the Faithful.At the hands of a consultant, the Lord of the Faithful.
In Sha'ban from the year eighty-five, from Damascus to this stone fifty-three miles.
InEurope, the distance measured typically starts at specified point within acity ortown, as many roads were named for the towns at either end. For example, inLondon,United Kingdom, a plaque near theEleanor cross atCharing Cross is the reference point from which distances from London to other towns and cities are measured. In the UK, milestones are especially associated withformer turnpike roads.
The British built many milestones on theisland of Malta. They consisted of large slabs of local hard rock and they were engraved with the distance to or from a particular location. Many of these were defaced inWorld War II to disorientate forces in apotential invasion. Despite this, a very small number of milestones still exist undefaced, and one of these is now in theMalta at War Museum.[2]
TheKos Minars orMile Pillars are medieval milestones that were made by the 16th-centuryAfghan RulerSher Shah Suri and later on byMughal emperors. These Minars were erected by the Mughal Emperors on the main highways across the empire to mark the distance.The Kos Minar is a solid round pillar, around 30 feet (9.1 m) in height that stands on a masonry platform built with bricks and plastered over with lime. Though not architecturally very impressive, being milestones, they were an important part of communication and travel in a large empire.[3]
Kos is an ancientIndian unit of distance. It can represent either a distance of approximately 1.8 kilometres (1.1 mi) or 3.2 kilometres (2.0 mi).Minar is a Persian word for tower.Abul Fazl recorded inAkbar Nama that in the year 1575 AD,Akbar issued an order that at every Kos on the way from Agra to Ajmer, a pillar or a minar should be erected for the comfort of the travelers.[4][5]
The historical termmilestone is still used today, even though the "stones" are typically metalhighway location markers and in most countries use kilometres and metres rather than miles and yards. Also found today are more closely spaced signs containing fractional numbers, and signs along railways, beaches and canals.
TheRailways Clauses Consolidation Act 1845[6] compels UK railway companies to provide their passengers with a means of determining the distance travelled (fares were set by distance at this time). Section 94 states:
"The company shall cause the length of the railway to be measured, and milestones, posts, or other conspicuous objects to be set up and maintained along the whole line thereof, at the distance of one quarter of a mile from each other, with numbers or marks inscribed thereon denoting such distances."[7]
Similar laws were passed in other countries. On the modern railway, these historical markers are still used as infrastructure reference points. At many points, the distances shown on the markers are based upon points no longer on the network – for example, distances measured via a closed line or from a junction which has subsequently been moved. Whole mileposts are usually supplemented by half and quarter posts. Structure signs often include the mileage to a fair degree of precision; in the UK, thechain (equal to1⁄80 mile or 20 metres) is the usual accuracy. In the U.S. and Canada, miles are "decimalized", so that, for example, there may be a "milepost 4.83" to mark a junction, crossing, bridge or tunnel.
Inmetricated areas, the equivalent is thekilometric point.
Surveyors place milestones to mark the boundaries between the jurisdictions separated by borders. A series of such boundary markers exists at one mile (1.6 km) intervals along theborders of the District of Columbia in theUnited States.
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