A makeshift memorial has been set up at a T-way in Sydney’s west where two teenagers died after a dirt bike they were riding collided with a bus.

William Drake, 15, and his passenger, Adrian Llai, 14, struck a bus on the Liverpool-Parramatta T-Way near Restwell Road in Bossley Park about 7.10pm yesterday.

Police said the trail bike became trapped under the bus after colliding with its side.

The two boys have been identified as William Drake, 15, and Adrian Llai, 14.The two boys have been identified as Adrian Llai, 14 and William Drake, 15. (Supplied)
A makeshift memorial was made at the scene of the incident. A makeshift memorial was made at the scene of the incident. (Nine)

It is believed William was driving the dirt bike on a T-way used only by buses and emergency vehicles when they were hit by a bus making a U-turn.

“I saw this little kid get hit by a big bus,” a witness told 9News.

“He was going about 100, he saw the bus [make a U-turn] and this guy went straight under the bus.”

Paramedics couldn’t save the boys, who died at the scene.

They are being remembered as best friends with a strong passion for motorbikes.

The two boys died at the scene. The two boys died at the scene. (Nine)
The pair were described as best friends. The pair were described as best friends. (Supplied)

The 48-year-old bus driver and his passengers were uninjured.

He was taken to hospital for mandatory testing.

“He’s since been released pending further inquiries,” Superintendent Craig Middleton said.

9News understands that William’s family home was 10 metres away from the scene of the accident.

“I remember him as my little daredevil, as my ride or die pretty much,” his brother told 9News.

Fairfield City Mayor Frank Carbone has been a vocal critic of the use of “illegal e-bikes and motorbikes” on the municipality’s roads, but particularly on the bus-only T-Way corridor.

Carbone called on NSW Premier Chris Minns to act.

“This is what happens when the NSW State Government ignores repeated requests for action on illegal E-bikes and motor bikes, which have taken over our T-Way,” he said on Facebook.

“My thoughts and prayers are with those who were hurt, and I sincerely hope they are OK.

A bike trapped underneath a bus in Bossley Park. The teens died at the scene. (Nine)
Tributes being laid at the scene were two teenagers were struck by a bus in Sydney's west. Tributes being laid at the scene were two teenagers were struck by a bus in Sydney’s west. (Nine)

“Chris Minns, enough of the media releases. It is time for action. Do your job, direct police to act, and respond to the repeated calls our community has been making before someone is seriously injured or worse.”

The NSW government moved last year to impose a 20km/h speed limit and a 16-year age limit for e-scooters, but didn’t include e-bikes in the changes.

The current age limit to obtain a learner’s license for a motorbike in NSW is 16 years and nine months.

At the time, Transport Minister John Graham said the government was acting because it recognised community concerns about device modification, fire risk, discarded shared e-bikes and poor rider behaviour.

A no bike sign in Bossley Park near a bus. William was driving the dirt bike while Adrian was a passenger on the back when they hit the turning bus. (Nine)

“They’re known as ‘micro’ devices, but e-bikes and e-scooters represent a major shift for our road and transport networks,” he said in a statement.

“We believe a sensible set of rules will promote the health and lifestyle benefits of e-bikes and e-scooters while protecting the safety of riders and everyone else sharing the paths and roads with them.”