https://eur-lex.europa.eu/eli/dir/1996/53/oj/eng
I tried to find some official document that properly explained how and why they agreed on these values, but it's really hard to find proper documents. After all, the directive was agreed on in 1996...
Here's a link to perplexity: https://www.perplexity.ai/search/why-is-the-length-of-trucks...
To sum it up, it's a mix of everything: Safety (for infrastructure and humans), efficiency, and of course EU-wide harmonization of standards.
https://eur-lex.europa.eu/eli/dir/1996/53/oj/eng
I tried to find some official document that properly explained how and why they agreed on these values, but it's really hard to find proper documents. After all, the directive was agreed on in 1996...
Here's a link to perplexity: https://www.perplexity.ai/search/why-is-the-length-of-trucks...
To sum it up, it's a mix of everything: Safety (for infrastructure and humans), efficiency, and of course EU-wide harmonization of standards.