Poorabiya Express: कोसी की शान से दिल्ली महान तक - Md Rashid Alam

For eg Mumbai me automatic signals he..
Total 4 light rehati he. From top to bottom
Amber(yellow)
Green
Amber (yellow)
Red....
more...

Ye sequence me rehati he.
First signal consider Kare green he, jab train yr signal pass karegi immediately signal switch to red. To piche wali train Ko line clear nai he to Wo ruk jayegi.
Jab Wo train next signal cross karegi to Wo Wo signal red hoga aur Jo piche red signal tha Wo yellow hoga. Yellow signal piche wali train Ko speed 15km/hr maintain karana padta he.
Jab first train uske aagewala signal Crosse karegi to Wo red hoga aur pichale signal red to yellow aur uske piche wala signal single yellow light to double yellow ho jayega.
Double yellow speed limit 30-35 km/hr ke aaspass rehata he.
Jab first train aur ek signal cross karegi to signal following sequence me change hoge.
Green to red
Red to yellow
Yellow to double yellow
Double yellow to green.