IN questioning the number of lanes on the Queensferry Crossing Scott Macintosh (Letters, September 1) says "the time has now come to admit that extreme parsimony by building four lanes has put us in the same traffic position as the old FRB [Forth Road Bridge]'.'

It was not ''parsimony 2 that led to a four-lane crossing, it was a deliberate technical decision.

A couple of weeks ago Audit Scotland gave a glowing report on Transport Scotland's management of this project. I contacted Audit Scotland and raised the question posed by Mr Macintosh.

Its response states: "In Transport Scotland's business case for the project [Transport Scotland] stated that the project was not intended to increase the capacity of the route for traffic and that increased demand for travel across the Forth will need to be met by public transport''. I wonder how many people know that ?

Indeed I understand that the Queensferry Crossing has been designed to cater for the 2007 traffic level across the Forth.

It makes me ask, how much has traffic increased since 2007, and it makes me wonder if this project design philosophy is a continuation of the policy that arose from the "aspiration" adopted by the Labour/Lib-Dem coalition that traffic in Scotland in the year 2021 should not exceed the 2001 level. It was this aspiration that led to the M80 being built on the line of the A80 through Cumbernauld and having to be squeezed through the Castlecary arches, instead of having an additional lane and going through the Kelvin Valley. Are there any other road/bridge projects that are being driven by Transport Scotland's present business case?

Nick Dekker,

1 Nairn Way, Cumbernauld.

I THINK the short and obvious answer to Scott Macintosh's question is there is no "headroom" for traffic growth on the Queensferry Crossing, as things stand at this point in time it already appears to have been under-designed.

Duncan Miller,

38 Middlemuir Road, Lenzie.