“Urban form can be understood at different levels of
resolution. Commonly, four are recognized, corresponding to the building/lot,
the street/block, the city and the region.” – Moudon, A.V (1994)
Since the dawn of man, urban morphology has been a
theme in human history. Since the urban revolution in 4th millennium B.C. Mesopotamia,
cities form the largest artifacts ever produced by humans and their most
dominant socio-spatial entity. Despite its archaic origin, urbanism survived
all subsequent socio-cultural changes: It was the most dominant cultural,
social and political spatial entity for the Sumerian, Acadians, Hittites,
Egyptians, Greeks, Romans, Byzantines, Persians, Chinese, Moslems and
Middle-Ages Europeans (J. Amos 1996) . In this urban wire,
we explore the nature and morphology of cities. Like a circuit, made up of
wires; string-like pieces or filaments of relatively rigid or flexible metals,
used chiefly for structural support, the patterns of its component parts and
the process of its development must be examined to fully understand the spatial
structure and character of a city. According to (J. Amos 1996) Portugali, cities
should be seen in terms of networks, stretching in time and space.
Construction in urban centers is an integral part of
its development; it includes both buildings and roads. The construction of
roads involves the removal of geographic obstacles and the use of new
construction materials that are far more improved and durable (Goel 2013 ) . There are a six
steps to the construction of roads, firstly preparation of sub-grade, then the
preparation of sub-base and base, as well as the preparation of wearing course
and shoulders then finally opening up to traffic.
The digging up of the sub soil provides the
sub-grade which is then compacted by rollers weighing eight tones by sprinkling
water one night before (civilblog.org 2015) . On this compacted
sub-grade, boulders, broken stones or burnt bricks are spread in layers of 15cm
thickness and then compacted once more to form the sub-base. Specified
materials are then spread on the sub-base and proper grade, thickness and cross
sections are maintained. The wearing course could be laid down in either one or
two layers, however each layer must not exceed 10cm. Shoulders are then created
by filling the earth to the specified cross slope and then compacting it. After
drying the road is open to traffic. Roads are constructed in city centers for
ease of access to and from it and are essential for the daily operations of
citizens.
The
area under construction shown in the pictures was taken on the corner of Charlotte
Street and Independence Square which is the southern part of the Central
Business District of the city of Port of Spain. It was taken on February 2nd at
around 12:30pm. The workers seen belong to the Port of Spain City Corporation
and are reconstructing the pavement for pedestrian use. Due to the rise in the price of oil in the
early 1970s, Trinidad and
Tobago was provided with the capital to finance development. Much of the
development programme that was launched involved construction work.
References:
civilblog.org. june 20, 2015.
http://civilblog.org/2015/06/20/6-basic-steps-comprising-wbm-road-construction-procedure/
(accessed february 29, 2016).
Goel, Tarun.
Bright Hub Engineering . May 2013 . http://www.brighthubengineering.com/structural-engineering/59665-road-construction-history-and-procedure/
(accessed February 2016).
J. Amos, L.S
Brune and J.Portugali. "Notions concerning the nature of world
urbanization, in Perspectives on Urbanization." Progress in Planning,
1996: 145-162.