Types of traffic controlling devices | Traffic SignsWednesday, June 19, 2013 16:46
Traffic signs are means of warning, regulating and informing the drivers.
Material for traffic signs
Material should be such that
- Which does not lost its color often.
- Rust resistant.
- Usually a sheet metal which is protected by a coating of some rust resisting material is used.
- Nuts, bolts are all galvanized.
Types of signs
Traffic signs are of three types.
- Warning signs.
- Mandatory signs.
- Informative signs.
Warning signs call the attention of the driver to some approaching hazard. For example;
- Level crossing.
- Road functions.
- Narrow bridges.
- Sharp curves.
These are regulatory signs or prohibitory signs enforced by the law. For example
- Speed limit.
- No parking.
- No blowing horns.
Non observance of these signs constitute as penal offence, crime punishable under law. Such a sign is called mandatory sign.
These are the signs which convey some sort of information to the drivers. For example;
- Sign showing the location of gasoline pump.
- Bus stops.
- Distance of cities.
- Rest houses.
- Motels etc.
They are not mandatory signs, and there is no prosecution if we ignore these signs.
Placement of traffic signs on roads
Warning and mandatory signs should be installed 5 feet above the road way and at a distance of 6′-12′ from the edge of the pavement. The distance of sign from hazard for a high speed highway is 1500 feet.