Cabinet member for planning Roy Pegram is frustrated by the contractor
A councillor has accused a contractor building a £116m guided busway from St Ives to Cambridge of creating a cycle path which is "more like a river".
Cambridgeshire County Council cabinet member for planning Roy Pegram criticised BAM Nuttall after a report blamed the firm for defects.
The scheme, originally due to be finished by April 2009, is not expected to be completed until November.
BAM Nuttall said it would issuing a statement later.
More work is needed to get the project up to the required standard, Cambridgeshire County Council has said in a report.
The report, criticising BAM Nuttall, will go to council's cabinet on 16 March.
The opening of the £116m guided busway has been delayed
Mr Pegram said he was "incredibly frustrated" by the lack of progress by BAM Nuttall on completing the route.
"BAM Nuttall have been notified there are defects on the busway.
"However, they are not accepting that defects that they have been notified of are in fact defects," said Mr Pegram in a council statement.
"These are defects such as a cycle path that the contractor has built in a drainage ditch so it is unusable for much of the year.
"You don't have to be an engineer to see the cycle path that BAM Nuttall has built looks more like a river than a cycle path in some places.
"All we want is BAM Nuttall to be reasonable and finish the scheme as they are contracted to do, to the standards Cambridgeshire residents expect."