COMMENT: Cummins decision a reality check for NG

What a difference (almost) a year makes. During the 2013 Mid-America Trucking Show, the conversation was - seemingly - almost entirely devoted to natural gas. Now comes news that Cummins has halted - temporarily - the development of its 15-litre ISX 15 G engine, plans for which were first announced mid 2012. Cummins' news - which follows a period of speculation - has come just a couple of months after Westport's decision to suspend orders for its 15-litre engine in favour of a more OEM-focused approach.