Highway lanes could have different speed limits

DIFFERENT speeds for highway lanes could be on the cards as the Queensland Government refers thousands of comments on speed limits to its safety boffins.

After opening up discussion on how speed limits worked throughout the state, about half of the received submissions called for speed limits to be increased while a third wanted them lowered.

Transport Minister Scott Emerson on Thursday also released very preliminary hints summarising some of the submissions, which called for speeds to be changed for parts of the Ipswich Motorway, M1 and Brisbane Valley Hwy.

Many pushed for more consistency in the limits, frustrated at having to brake then accelerate without any clear justification.

Mr Emerson gave no clear indication the investigation's end result, only saying it would be up to experts to determine which options were safe enough to consider.

Among those, the minister said the concept of multiple speed limits for highway lanes would be considered.

"We have to take all of that on board," Mr Emerson said.

"But I'm going to leave that to the safety engineers".

What he did confirm was that the entire length of the Bruce Hwy would not be reviewed, although changes for specific sections may be considered.

Safety engineers will now whittle down the 3375 submissions to 100 specific sections of road, before the distilling the list even further.

Local governments will also need to be consulted, Mr Emerson said.

An announcement on final changes could be made within six months.