Hitrans chairman Charlie King this week led a delegation to Westminster to meet Transport Secretary Alistair Darling and Highland MPs to argue the case for using Public Service Obligations to protect Highland air services.
Hitrans hopes, if it can convince the Scottish Executive to promote a PSO network in the Highlands, the Department for Transport will rubber-stamp the application and present it to the European Union for approval.
The Highlands and Islands Transport Partnership HITRANS is partly funding the installation of a further charging point at Inverness Bus Station to allow the buses to receive a top-up charge during the day.
Ranald Robertson, Partnership Director, HITRANS added: "The introduction of these new carbon free buses in Inverness is great news for the city.
The council is supporting HITRANS (Highlands and Island Regional Transport Partnership) as they conduct an online survey which is available until 10 June this year.
The council are keen to work with Transport Scotland, Hitrans and other local authorities to align the tendering process for Public Service Obligation air services in the West of Scotland and identify gaps in the market where additional routes and services could potentially be introduced.