Article 75-8-2Traffic Distribution for Motor Vehicles Towing Heavy Towable Vehicles
第七十五条の八の二（重被牽引車を牽引する牽引自動車の通行区分）
Article 20 does not apply to lanes for standard, mid-sized, semi-mid-sized, large, and special large motor vehicles with the structure and equipment for towing (hereinafter referred to as a "motor vehicle equipped for towing") that are towing heavy towable vehicles, when the motor vehicle equipped for towing is traveling on the main roadway of a limited highway (but only one as prescribed in the following paragraph) or national expressway with vehicle traffic lanes. In such a case, the following paragraph through paragraph (4) applies
On the main roadway of a limited highway with vehicle traffic lanes (but only on sections designated by road signs or markings), a motor vehicle equipped for towing as referred to in the preceding paragraph must travel in the far left-hand vehicle traffic lane.
On the main roadway of a national expressway with vehicle traffic lanes, a motor vehicle equipped for towing as referred to in paragraph (1) must travel in the far left-hand vehicle traffic lane (or in the vehicle traffic lane that is designated by road signs or markings).
It is permissible for a motor vehicle equipped for towing as referred to in paragraph (1) not to observe the preceding two paragraphs when passing a motor vehicle traveling at a speed below the minimum speed limit as prescribed in Article 23 or Article 75-4; when continuing to travel in the vehicle traffic lane in which it has been traveling pursuant to Article 26-2, paragraph (3); when temporarily yielding the right-of-way pursuant to Article 40, paragraph (2); or when road conditions or other circumstances compel this. In such a case, the motor vehicle equipped for towing must use the vehicle traffic lane to the immediate right of any motor vehicle it is passing in order to pass that motor vehicle.