Conventional signs and markings are visual means of providing information, guidance and instruction to travellers during their journey. Their objective is to promote the safe and efficient use of the transport system. Both signs and markings impart information but also have a role in the management of traffic. In many cases, signs and markings are used in conjunction with each other.
Signs and markings include:
• Upright signs - various types of upright signs with textual or graphical images, for information, regulation or warning
• Road markings – provided to channel traffic and to convey
warnings, regulatory requirements or basic information
Common standards for signs and markings exist to help ensure that travellers can easily understand signs wherever they might be travelling.
Conventional direction signing can provide benefits to car users, and
other traffic, by reducing journey lengths and travel times; direction
signing can also be used to divert traffic away from environmentally sensitive
There is little direct evidence on their effectiveness but it is known
that direction signing can help to reduce congestion, by reducing driver
confusion, journey lengths and travel times, while regulatory signing
can influence congestion by reducing the number of accidents that impede
flows and generate delays.