These instances have been used in the papers:

E. Fernández, G. Laporte, J. Rodríguez-Pereira, (2017), A branch-and-cut algorithm for the Multi-Depot Rural Postman Problem. Transportation Science. To appear. 

E. Fernández, J. Rodríguez-Pereira (2017), The Multi-Depot Rural Postman Problem. TOP, 25. doi:10.1007/s11750-016-0434-z.