A news article published on Russian government daily newspaper Rossiyskaya Gazeta on Dec. 2 says Moscow has given up on the development of a rail-based intercontinental ballistic missile (ICBM).
By George Shuklin (Own work) [CC BY-SA 2.5], via Wikimedia Commons
Sergey Ptichkin reported that the main reason could be due to the lack of funds as Russia has develop new intercontinental ballistic missiles in the recent years.
Also, a successful test of the new rail-based system has been carried out. If needed, Russia can quickly restart the development process again.