Lane direction is not taken into account

[hahne]

Hi,

Thanks for the great work!

One question, is there a reason why the lane direction is not taken into account or am I missing something?

According to the OpenDRIVE standard, lanes are grouped in left and in right lanes:
<lanes> <laneSection s="0.0"> <left> <lane id="2" type="border" level="false"> <link> </link> <width sOffset="0.0" a="1.0" b="0.0" c="0.0" d="0.0"/> </lane> <lane id="1" type="driving" level="false"> <link> </link> <width sOffset="0.0" a="4.0" b="0.0" c="0.0" d="0.0"/> </lane> </left> <center> <lane id="0" type="none" level="false"> <link> </link> </lane> </center> <right> <lane id="-1" type="driving" level="false"> <link> </link> <width sOffset="0.0" a="4.0" b="0.0" c="0.0" d="0.0"/> </lane> <lane id="-2" type="border" level="false"> <link> </link> <width sOffset="0.0" a="1.0" b="0.0" c="0.0" d="0.0"/> </lane> </right> </laneSection> </lanes>

This tells you that the lane direction is equal to the center lane direction for for the lanes grouped under the -tag. But I don't see this information being available in libOpenDRIVE. Am I missing something?

I added it in my implementation. Can make a pull request if there's any interest.

Kind Regards,
Johannes

[pageldev]

Hi Johannes, thanks for the feedback!

Can you point me to the chapter in the OpenDrive format spec for the lane direction info? Not 100% sure what you mean.

[michikommader]

As far as I always interpreted OpenDRIVE, lanes have their "direction" defined implicitly by their index and their road's rule attribute holding information about right-hand (RHT) or left-hand traffic (LHT):

Lanes -1, -2, etc. are defined as being right of the reference line geometry.

• If rule == RHT, their direction is the same as the geometric direction of the reference line.
• If rule == LHT, their direction is the opposite of the geometric direction of the reference line.

Lanes 1, 2, etc. are defined as being left of the reference line geometry.

• If rule == RHT, their direction is the opposite of the geometric direction of the reference line.
• If rule == LHT, their direction is the same as the geometric direction of the reference line.

Lane 0 is defined in direction of the course of the reference line geometry.

[pageldev]

Looks like the rule attribute was introduced in v1.45. When creating this project I targeted v1.4.