This place is causing me a big lag how to solve a problem ?

Sulps

Goldpot Hunter of the Year | 2019 & 2022
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As far as I can tell, you already have /objects off in the screenshot. Otherwise there would be ramps and roads above the construction site.
If you only get lag in specific places, like near /wang, then it might be the large number of vehicles causing lag. Honestly, I'm not sure what you could do about it. Changing graphics settings might help, such as disabling vehicle reflections, as Slothy suggested.
 
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