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by ZeroGravitas 109 days ago
The (bad) justification for overtaking seems a much better justification for the slower truck to fix their calibration and go faster.

Lots of good info but it all feels a bit like it is being used to create a "just so story" to support whatever the current status quo is.
1 comments
schiffern 109 days ago
Right. If 0.5 mph is so valuable (which I believe), how do we explain the slow trucks? How do we fix the slow trucks?
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ben_w 109 days ago
IIRC, the difference in radius between fresh tires and those worn down to just before they need replacing, changes the actual speed at any given speedometer reading by about 2%.

C=πD and all that.

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schiffern 109 days ago
Makes sense.

Nowadays you could apply a long-term trim using the GPS speed, including correcting for variations due to steering inputs and elevation.

Mandatory for new trucks and grandfather old ones, like how most new vehicle standards are adopted.

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