Waikato and Bay of Plenty drivers are urged to be aware of potentially hazardous ‘summer ice' on the regions' roads, says Waka Kotahi NZ Transport Agency.

'After an extended run of warm, dry summer days like we've had, any rain can result in slippery road surfaces, otherwise known as summer ice,” says NZTA transport system manager Rob Campbell.

'Even a very small amount of rain can make the roads very slippery. In fact, it can be more hazardous than heavy rain because grime and exhaust particles that have built up on the road take longer to be washed away.

'The combination of light rain and summer grime creates a slippery film on the road.

'We advise anyone who is driving in the rain or on a damp road at this time of year to take extreme care. The slippery film on the surface of the road is invisible, so don't assume it's not there just because you can't see it.

'We ask that drivers keep safe in these conditions by increasing their following distances, reducing their speeds and taking extra care.”

Rob also urges drivers to check the tread level and air pressure on their tyres.

'Properly inflated tyres with good treads are always a must for safe travel, but even more so in wet or slippery conditions.”