Could you share a link to the page you are trying to download the dataset? To my knowledge, I don't believe the dataset is part of the OpenVINO toolkit.
Thanks for your response.
It is indeed an external dataset refered to by your webpage
The dataset link is http://iitlab.bit.edu.cn/mcislab/vehicledb/
In github, it was commented as "nothing can be done, it does not belong to intel" ( paraphrased).
So we can close this issue, thanks