Highway T2 Flashcards
Is a road that is trafficable in all weather conditions.
All-weather road
if traffic is interrupted during monsoon at course ways where water overflows for a few hours
fair weather roads
have bituminous sirface or concrete surface for the carriage-way
Superior paved roads
bituminous road is also known as a
black-top road
are classified on their function and location
urban roads
urban roads
- expressways
- arterial streets
- sub-arterial streets
4.collector streets - local streets
a convenient way over which vehicles may lawfully pass for going from one place to another
road
Used for servicing and as a means of access to
adjacent property; constructed parallel to the main road
service road
A road within a town or a residential locality with
buildings on one or both sides.
street
Road connecting one place to another on the
country-side.
country road
A road within a town or a city.
urban road
A road constructed skirting a village or a small
town, taking off through a highway and joining it after bypassing
the inhabited area; this helps through traffic to move fast
without having to enter the village or town.
bypass road
Any public road or a street may be called a
highway
Road passing within a city and linking the
state or national highway, with limited access.
arterial road
An arterial highway with controlled access
crossing other roads at different levels.
freeway
Very wide road with avenue on its either side;
generally used for ceremonial processions or considered as
prestigious roads in a city.
boulevard
This is also known as rectangular or block
pattern and is perhaps the simplest.
grid iron pattern
The disadvantages of this pattern are monotonously long streets and the inconvenience in traffic operation.
grid iron pattern
roads emanate from a central focal area, which may be a business centre or an important public building.
radial pattern
is known as a minimum travel pattern and was used in certain cities to great advantage.
hexagonal pattern
For assessing the road length requirements, following studies are made:
planning surveys
planning surveys
- economic survey
- financial survey
- traffic and road use studies
- engineering studies
The laying out of
the center line of a proposed highway on the
ground is called
alignment
requirements of an ideal alignment
- directness
- Ease of construction, maintenance, and operation
- safety
- Economy
- Special Considerations
This is the alignment of the
roadway in the horizontal plane; although it is ideal to have a straight route between end points,
it is practically impossible owing to several constraints. A change in
direction necessitates the use of horizontal curves for smooth flow
of traffic.
horizontal and vertical alignment
Engineering survey for highway location
1.map study
2. preliminary survey
3. final location and detailed survey
It is the process of understanding existing
site qualities and factors which will determine the locating of a particular
highway.
soil suitability analysis