この道はいつも多くの車が通る。

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

road; street; way; path; course; route; lane; distance; ways (e.g. "a long ways"); the way (of proper conduct, etc.); one's way; morals; teachings (esp. Confucian or Buddhist); dogma; field (of medicine, etc.); subject; way; method; means

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

always; usually; every time; never

many; much; largely; abundantly; mostly

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

car; automobile; vehicle; wheel

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to go by; to go past; to go along; to travel along; to pass through; to use (a road); to take (a route); to go via; to go by way of; to run (between); to operate (between); to connect; to go indoors; to go into a room; to be admitted; to be shown in; to be ushered in; to come in; to penetrate; to pierce; to skewer; to go through; to come through; to permeate; to soak into; to spread throughout; to carry (e.g. of a voice); to reach far; to be passed on (e.g. of a customer's order to the kitchen); to be relayed; to be conveyed; to pass (a test, a bill in the House, etc.); to be approved; to be accepted; to go by (a name); to be known as; to be accepted as; to have a reputation for; to be coherent; to be logical; to be reasonable; to be comprehensible; to be understandable; to make sense; to get across (e.g. of one's point); to be understood; to be straight (e.g. wood grain); to be well-informed; to be wise; to do ... completely; to do ... thoroughly