Railpool leasing was the launching customer of the Traxx AC3 locomotive platform, which was first presented in May 2011. Initially, Railpool ordered five AC3 units with additional Last-Mile Diesel feature. This order was part of a framework agreement for the delivery of 36 Traxx locomotives signed in December 2010. Over time, the number of 187s in the fleet of Railpool grew to 30 locomotives.
Locomotive 187 004 was the first Traxx AC3 locomotive in Railpool colors. it left the Bombardier factory in Kassel in November 2013.