The truck had been stuck in slow traffic for hours on its way to the port.

货车在前往码头途中，遇上塞车，滞留数小时。

youdao

Why couldn't a licence be given over mobile phone to the car to say "OK, you can drive yourself a few miles because all the cars know what's happening."It's very slow traffic on a well-known road.

“为什么我不能通过手机授权车辆自动驾驶说：“好吧，你可以自动驾驶，因为前面的几英里路所有的车辆都知道发生了什么，那段路是有名的拥挤。””

youdao

Why couldn't a licence be given over mobile phone to the car to say "OK, you can drive yourself a few miles because all the cars know what's happening." It's very slow traffic on a well-known road.

“为什么我不能通过手机授权车辆自动驾驶说：“好吧，你可以自动驾驶，因为前面的几英里路所有的车辆都知道发生了什么，那段路是有名的拥挤。””

youdao

The road is narrow and the traffic is often slow as it travels through each of the small towns of the Keys.

VOA: special.2010.03.22

Commuters also complained about other drivers' rude and aggressive behavior when traffic started to slow or stop.

VOA: standard.2010.07.26

In Warwickshire, the M40 was blocked and there was slow traffic at junction 3a for the M42.

BBC: Widespread travel disruption after heavy snow

We enjoyed the gentle hum of the all-electric experience, especially in areas with slow traffic where power isn't necessary.

ENGADGET: Ford C-MAX Energi plug-in hybrid test drive (video)

Tim Backhouse, who moved to Bow two years ago, said he hoped the 15ft (4.5m) sign would slow traffic.

BBC: Large 30mph speed sign painted on house in Bow, Devon