In its sector skills agreement (SSA), backed by the Department for Transport and the Learning Skills Council, GoSkills said the ageing workforce in England "cannot be replaced through traditional demographics".
It noted that almost half of professionals are aged 50 or older and women represent only 18 per cent of the workforce. It recommends offering induction processes and mentoring to retain staff, training consortia and recognised qualifications.
GoSkills is also working with the Transport Planning Society to develop NVQ level 3 standards that could encourage a non-graduate route into the profession.