What is wdp 4b?

WDP 4B is a type of diesel-electric locomotive used on Indian Railways. It is manufactured by Chittaranjan Locomotive Works and was introduced in 2001. The locomotive has a maximum hauling capacity of 24 passenger coaches or 58 freight wagons. It has a top speed of 130 km/h and is equipped with advanced features like AC-DC transmission, microprocessor control, and regenerative braking. With more than 1,200 units in operation, WDP 4B is considered a workhorse of the Indian Railways fleet and is used extensively for both passenger and freight transportation across the country.