A line of semi-trailer trucks blocked lanes on a highway in the United States yesterday in a stunning show of support for a man who was considering taking his own life.

Michigan State Police responded to a call around 1am local time of a man standing on a bridge on the I-696 highway near Oak Park in Detroit, according to Fox2 News .

Authorities blocked all lanes of traffic that ran underneath the overpass but eventually waved through a number of semi-trailer truck drivers, who then parked underneath the bridge on both sides of the road.

Michigan Police teamed up with 13 semi-trailer truckers to prevent a man from taking his own life on Detroit's I-696 highway. Picture: Fox2 News. (Fox2 News)

In total, 13 trucks were seen blocking lanes in both directions to limit the distance the man could fall from the bridge, while police negotiators spoke with him.

After several hours, the man was walked off the bridge and taken to nearby Beaumont Hospital.

Michigan State Police later said in a Twitter post that the line-up of trucks showed “the work troopers and local officers do to serve the public”.

“But also in that photo is a man struggling with the decision to take his own life. Please remember help is available,” the post said.

“It is our hope to never see another photo like this again”.

*Readers seeking support and information about suicide prevention can contact Lifeline on 13 11 14.

*Suicide Call Back Service 1300 659 467.

*MensLine Australia 1300 78 99 78.