No need to honk the horn under such a traffic block.

在这种塞车的情况下，你再按喇叭也无济于事。

youdao

My car almost [nearly] stood still because of a traffic block.

我的车子因为交通阻塞而几乎动弹不得。

youdao

The small roads are chock-a-block with traffic.

小路被车辆塞得满满的。

《柯林斯英汉双解大词典》

For five hours this Sunday, some 10 miles of normally car-crowded Los Angeles streets will be closed to vehicular traffic and turned into a massive block party for cyclists, pedestrians, joggers, even stilt-walkers.

FORBES: LA's 10-Mile-Long Block Party

Traffic was stopped, and a block full of honking cars had to back up down the street.

WSJ: Celebratory Crowds Swirl Around Ground Zero

Lives are at stake when the fire department needs a utility to shut off power to a downed line and the police department to block traffic in the area.

FORBES: The Obama Doctrine: Decide In Secret, Impose In Public