This means Ealing would become the first borough in West London to have a borough wide 20mph speed limit, which would also be one of the largest area-wide zones in London.
The council will now undertake a public consultation on the introduction of the new speed for a trial scheme in the Acton area. Subject to a successful trial and review, the 20mph speed limit will be introduced in the rest of the borough.
The new urban speed limit of 20mph aims to increase road safety and reduce traffic noise, as well as pushung people to cycle or walk.
Councillor Bassam Mahfouz, cabinet member for transport, environment and leisure, said: “We already have 20mph zones or limits in 37% of roads in Ealing and reducing speeds across the borough will bring many benefits, such as enhancing road safety and improving the health and quality of life for our residents. Studies have shown that a borough wide speed reduction could prevent approximately 60 casualties each year.
“We want our roads to be among the safest in London and actively encourage residents and visitors not only to reduce their speed, but also to get out of their cars and walk or cycle in our borough.”
The public consultation will take place later this year and, subject to the outcome, the trial in Acton is expected to start in the summer of 2016 and run for a year. A successful trial and review will see the speed limit expanded to residential areas and town centres across the borough by spring 2019.
The 20mph limit would not apply to the Transport for London Road Network (TLRN) red routes.
Businesses have previously spoken up against blanket 20mph limits as they feel it slows deliveries and other business traffic.