Pattaya has replaced rubber cones with concrete barriers at the South Road intersection with Soi 16 after people continued to make illegal and dangerous U-turns there.
Drivers were cutting through traffic to make their way to Soi Bongkot and Soi Korphai, exacerbating heavy rush-hour traffic.
The new barriers stretch from South Road Soi 5 to the Pattaya City Resort.
Traffic reports since the installation this month show that congestion has eased and traffic is flowing more smoothly.
