(12 Feb 2016, 3:15 pm)Andreos1 wrote The 64a could easily divert along Greystone Road and maintain the link between the terminus and Eston.
How long would that add to the journey?

And still, you miss what is presently the evening terminus of Whale Hill Shops. And I don't believe there's a stop in Grangetown on that side of the roundabout on the Trunk Road.

As had been said, what is now the 64a is a commercial service introduced in October 2011 when Redcar and Cleveland Council reduced their Bus Funding to early morning (794, 746/747) only and took some daytime runs in-house (752, 758/759, Guisborough Towns). Everything on evenings and Sundays was withdrawn and initially Arriva's replacement commercial services (22a replaced the eastern part of the 789, 64b replaced the 794/795 and the 48a replaced the 748 and also the 22 in New Marske) only operated during the day on Sundays before the 64b was introduced on an evening (operated by Stockton depot initially as well). As said as well, given the current issues along the Grangetown section of the 64a on a night, I wouldn't be at all surprised if in July, it isn't either cut short to say Eston or Whale Hill, or even scrapped entirely (which then saves Redcar a bus on an evening).