The 'phenomenon' of parking adjacent to major routes and sharing journeys was well observed by your correspondent Mr Crook (NCE Letters 25 July/1 August).
Readers will be interested to note that in Northern Ireland the practice of park and share is encouraged by the Department for Regional Development's Roads Service through the provision of formalised car parks at locations where informal parking takes place.
The success of the initiative has been reflected in demand for more space, for example, the facility at the M2/A26 Dunsilly interchange has recently been extended by 75 spaces.
The Regional Transportation Strategy 2002 - 2012 agreed by the Northern Ireland Assembly on 3 July makes provision for further investment in park and share.
Bert Bailie (M), principal engineer, Roads Service Transportation Unit, Avenue House, 42/44 Rosemary Street, Belfast BT1 1QE