Ford driver Petter Solberg has admitted he has reservations about the Rally of Portugal organisers' decision to water Thursday night's opening stages of the fourth round of the World Rally Championship.
The drivers are concerned at the level of dust which will hang in the dark, cutting visibility on the three stages, which is why the organisers elected to run a water bowser through the test dumping thousands of gallons of water.
Solberg said: "I'm not sure this is the right thing to do, there will be pluses and minuses to doing this.
"If you are first on the road straight after it's been watered, there could be a lot of standing water and then how long is the water going to stay before the dust starts coming through?
"It's very hard to know, it's a tough one. Maybe the best thing would have been to put bigger gaps between the cars."
The leading crews in the World Rally Championship usually start with two-minute gaps, but in Portugal they will run with three - with the possibility of that being increased to four if needed.