Work worth £440,000 has started on a series of upgrades expected to provide quicker and more efficient access for ferry users at Stornoway harbour.
Additional marshalling approach lanes will be installed during April.
Together with corresponding changes to check-in procedures, the work is aimed at reducing delays on Shell Street during early morning and lunchtime bottlenecks.
Improvements are also being carried out to the terminal car park and drop-off areas.
These will include the mini roundabout at the terminal building being removed and a new exit route created via a revised car park layout.
The changes will mean car parking is closer to the building, turning areas will be larger and there will be more drop-off spaces, as well as improved passenger walkways and access.
The work follows a previous upgrade for terminal facilities and is 50% funded by the Scottish Government.
It follows talks involving Stornoway Port Authority (SPA), Calmac Ferries, Western Isles Council and Transport Scotland.
SPA is also working on further drop-off areas at its Shell Street long-stay car park, and it is expected these will be ready by the summer.
Chief executive Alex MacLeod said: “In light of experience gained in using the upgraded facilities, it became apparent that both the marshalling layout and parking arrangement at the ferry terminal required further development.
“Traffic management arrangements will ensure that there will be minimal effect on ferry terminal users.”