It can be dangerous trying to send someone a message. Spoken words may be overheard, written correspondence may be intercepted, and body language may be seen. Did you ever wish you could think the words and they would be known?
Gareth turned and squinted uneasily over his shoulder. He could have sworn he heard a high pitched hiss. He turned back to continue through the dim underground passageway. It was then that he saw them. A pair of ruby red eyes, glowing faintly a few feet front of him. He had to look up to see them, and that is saying something, given Gareth’s generous stature. The strike was quick…he had no chance. The last thing he remembered were the eyes hovering above him and the fangs dripping venom. And was that a second set of eyes gleaming beneath the first…?
As the PCs travel the road, right after a bend they hear a sharp whistle and call: "Heeey, not so lazy, move your asses!" It is a large man that calls, and there are unwilling workers that listen. A small company, 10-15 men work on the road, push boulders aside, dig up roots from under the road, etc. The large man that shouted turns to you, smiles fast and mutters something under his breath, sounds like cursing some lazy worker. "Where does the road bring you from, travellers?" And does a little small-talk.
And what is really happening? A group of bandits is 'adapting' the road for shady purposes. The road will not be wider, but tighter, with enough cover around (and a few traps perhaps), and will become an ideal spot for ambushing travellers or entire caravans. The bandit leader wants them all to appear harmless. The 'lazy worker' he cursed was actually a guard that should give warning before any travellers come around (fallen asleep). Not surprisingly, the boss may decide for an ambush even now.