Essential repair work is planned on: Balderston Bridge, north of Linlithgow Bridge; Plantation Bridge, east of Winchburgh; and Woodend Bridge, north of Armadale.
Routine inspections of all three bridges identified essential repairs that were required to ensure the long-term durability of the structures, with a modern safety barrier also to be installed at Woodend Bridge.
All three projects will involve road closures for a maximum of four weeks to allow them to be safely completed. It is hoped that the projects can be completed within a shorter timescales if conditions allow, with Chemcem (Scotland) Ltd carrying out the work on behalf of the council.
Executive councillor for the environment Tom Conn said: "It's essential we continue to invest in our road network and I'm delighted to see the £50,000 investment ensuring these rural bridges can be used for many years to come.
"We would like to thank road users for their patience while these works are completed. In all three cases, the restricted road width means a road closure is required to ensure the safety of road users and the workers carrying out the repairs."
"Full information in each closure, including location maps, is available at Road Closures and Diversions in West Lothian"
Balderston Bridge is located north of Linlithgow Bridge on the B8029 Mill Road at Fishers Brae to the north of the M9 motorway, and work is due to start on Monday 9 September.
The road will be closed from the junction at Mill Road Industrial Estate to the junction with the A706 Linlithgow to Bo'ness road, with local traffic and pedestrian access maintained.
Plantation Bridge is located east of Winchburgh and carries the U18 single carriageway road over the Swin Burn between the M9 motorway and the B9083, with work due to start on Monday 7 October 2019.
The road will be closed from the junction with the B9080 to the junction with the U18 at the bridge over the railway, with a diversion route in place. Pedestrian access will be maintained at all times.
Woodend Bridge is located on the C7 road over the Barbauchlaw Burn to the north of Armadale and work is due to start on Monday 21 October 2019.
The road will be closed from the junction with Glenwood Drive to the junction with the C14, with a diversion route in place. Pedestrian access will be maintained at all times and local traffic access will be maintained to the garden centre and adjacent properties.
For more details on these and other road closures in West Lothian, please visit Road Closures and Diversions in West Lothian.