Police said yesterday that the numbers of drivers receiving fixed penalties under the average speed camera regime would not be finalised immediately.
While 298 vehicles were recorded breaking the limit, not all will receive the mandatory fine for the offence.
This is because some might be emergency service vehicles, which are exempt if attending a call.
Other motorists may be reported direct to the procurator fiscal because of the excessive speed.
A police spokesman said that the registered owner of each vehicle had to be written to in order to determine who was driving at the time of the offence.
He said: “Some people will get a conditional offer of a fixed penalty, others will be reported straight to the fiscal.
“Some might be foreign vehicles and that will have to be checked.”
Meanwhile during topical questions at the Scottish Parliament yesterday, Dave Thompson, SNP MSP for Skye, Lochaber and Badenoch asked the Scottish Government in Parliament about the data gathered following the introduction of the cameras.
Mr Thompson said that the information, which showed a drop in speeding and more reliable journey times, vindicated the government.
He said: “I welcome the fact that the minister warned politicians who still attack the camera installations that they risk being seen to be making cheap political points from such a serious safety issue.
“They also risk ridicule as the evidence is HGV’s are making the journey between Perth and Inverness (and vice versa) more quickly than before the cameras and the 50mph pilot and this can only aid the economy.”
Mr Thompson added: “I call on the A9 speed camera detractors, including Danny Alexander, who is beginning to look like he is taking the criticism to quite absurd lengths I never thought was possible, to finally stop playing the A9 average speed camera game, and accept that the cameras have been a force for good.”