If you talk about a truck with a high load it means that it is stacked very high with cars or a lot of goods. Often there are signs on bridges warning these trucks not to pass under them.

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So, it means ‘choose the right way, instead of cheating or making a shortcut, I guess. Thanks, everyone.

"High lord" doesn't make any sense. However, if someone takes the "high road" it means that they are making a morally correct choice. For example: "Bob found a wallet with $10 in it. He took the high road and turned it in to the police." I suppose it could be used in the manner your translations suggested. For example: "My boss is an idiot. He talked for 30 minutes and didn't make any sense at all. But, I took the high road and kept my mouth shut."

That is what I heard on TV, I might have misheard. Could be ‘high road’ or ‘high lord’. I don’t have the whole sentence, but translation(subtitle) came out as something like ‘patiently’ or ‘not complaining’ for the word i have been losing. Thanks.