Plans for nearly 5km of new bike routes costing €10m have "serious deficiencies", a cycling lobby group has said.
The Dublin Cycling Campaign said the faults call into question "the competence of the designers and the checking procedures".
Dublin City Council, which made the application as part of a local authority works (LAW) scheme, wants to construct 2km of cycle ways beside the Grand Canal, from Portobello to Grand Canal Street Lower.
A further 405m is to be installed from Grand Canal Street Lower to Pearse Street, while 409m will be constructed from Hanover Quay to the southside of the Samuel Beckett Bridge.
Some 1.1km of cycleway will run adjacent to the Royal Canal, from Samuel Beckett Bridge to Ossory Road.
As part of the plan, a pedestrian and cycle bridge will be built beside the existing Iarnrod Eireann bridge at Ossory Road, with 580m of cycleway from West Road to East Wall Road.
The Department of Transport-funded proposals also make provision for the construction of an 87m-long cycle boardwalk on western approach to Leeson Street Bridge.
The application will eventually come before a full meeting of Dublin city councillors for approval.
In a public submission on the application, James Leahy of the cycling campaign said the designs use "deficient 1.25m cycle lanes" and mark cycle lanes "where cyclists are at risk of hitting opening car doors".
He added: "The designs are not legible or intelligible. It is not clear how cyclists are supposed to get between the cycle route and adjacent streets."
Mr Leahy said the plans are "more similar to the current deficient cycle-track designs than a premium route".