Scottish politicians were this week warned to plan future infrastructure spending carefully to avoid destabilising the civil engineering sector which is working at full capacity.
The ICE, the Civil Engineering Contractors Association and the Association for Consultancy & Engineering homed in on the water and transport sectors ahead of the 3 May Scottish election.
They warned that in the water sector, 'the current four year regulatory period is too short and too rigid.
'This leads to a huge imbalance in the flow of work and is particularly acute at the transition between periods.'
They called for longer regulatory periods to be introduced, and that these be 'out of phase' with the English water industry's five year investment programmes.
This would help soften the impact of stop-start spending cycles on revenues and stafng levels.
On transport, the bodies called on Scottish MPs to honour commitments to transport spending and to investment timetables, 'so that the industry can plan'.
They said that local authority highways budgets must be ring fenced to ensure that degraded infrastructure can be patched and improved.