re: Road Intersection Management Algorithm? There are two methods I have seen been deployed in traffic junctions across Indian cities: Method 1:
a. (1) and (3) move straight ahead simultaneously
b. (1) and (3) take right turns simultaneously
c. (2) and (4) move straight ahead simultaneously
d. (2) and (4) take right turns simultaneously
This is typically used at large junctions where two opposite stream have sufficient place to take right turns without obstructing the opposing traffic.
Usually the left turn (for 1, 2, 3, 4) is also kept free in such cases. (Except Mumbai)
### Method 2:
a. (1) is allowed to move straight ahead as well as take a right turn
b. (1) continues moving straight ahead but right turn is stopped, simultaneously (3) starts moving straight ahead
c. (1) is stopped completely and (3) starts taking right turn also
d. (3) is stopped completely and the same sequence is followed for (2) and (4)
This is usually done on small junctions where simultaneous right turns of opposing stream can cause obstruction. In addition this is also used when the roads are quite narrow and you wish to drain them completely before focusing attention to other roads. Left turn can also be clubbed with merging straight movement [i.e. (1) left turn + (4) straight]
Incidentally, most traffic policeman also implement this method. |