Learn Romanian: Traversează strada acum!

A traversa (to cross) is a Group 1 verb, which means it ends in -a. For most Group 1 verbs, the affirmative singular command (telling one person to do something) looks exactly the same as the "he/she" form in the present tense. Since "he/she crosses" is el/ea traversează, the command "Cross!" is also Traversează!

If traversează means both "Cross!" and "he/she crosses", how can I tell them apart?

You can tell by the context, tone of voice, and punctuation. As a command, the verb usually drops the subject pronoun (like el or ea), often sits at the very beginning of the sentence, and takes an exclamation mark.

Could I say Traversezi strada acum! to tell someone to cross?

No, because tu traversezi just means "you cross" or "you are crossing" as a regular statement of fact. To give a direct order to one person, you have to use the imperative form traversează.

Why is the word for street strada and not stradă?

In Romanian, "a street" is o stradă. To say "the street" for a specific street, you attach the definite article to the end of the noun. For feminine nouns ending in -ă, you replace that -ă with an -a, which gives us strada.