Can "crossroads" be represented by walki

Yes — that's how the RWS imagery mostly does it. A crossroads is rarely drawn as a signpost; it's drawn as two roads under a figure who has stopped on them.

• Two of Wands (权杖二) — the clearest one: he stands with his back to a walled coast, a globe in hand, two routes in front of him, and he's looking at one rather than walking either. The card is the fork itself, not the walking.
• The Fool (愚者 0) — a single cliff edge with the road running off it; the choice is built into the terrain rather than a branch in the road.
• The Hanged Man (倒吊人 XII) — no fork at all, but he hangs between two trees and two supports with his legs crossed: a crossroads frozen into one frame. Suspended between options.
• Six of Swords / Eight of Cups — leave it and you usually get a figure actually walking away down a road, which is the other way the motif carries: not which path, but having taken one.

So "walking paths" works as an image, but it does two different jobs depending on the card: the fork shown (Wands) and the journey resumed (Swords/Cups). If you want it for a reading, tell me the question and I'll pull — or if you're working on a deck layout or a piece of art, I can tell you which of those cards carries the motif without a draw.