Your concern about public benches becoming spots for indefinite loitering is a common challenge in urban design. The good news is that designers and city planners have developed several subtle, humane strategies to discourage long stays without making seating outright unwelcoming for legitimate users.
One prevalent approach is the use of divided or segmented seating. Instead of one long, inviting surface, benches feature individual seats with built-in armrests or subtle dividers. This physically prevents lying down while still offering comfortable perching spots. The material choice also plays a role; slightly angled seats or surfaces made of materials like perforated metal or slatted wood can become less comfortable over extended periods compared to flat, solid wood or plastic.
Another effective design incorporates elements that engage with the intended short-term activity. For instance, a bench at a bus stop might be just deep enough to sit comfortably but too narrow to sprawl out. Some designs integrate subtle time cues, like positioning seating in full sun without shade, which naturally limits occupancy during peak heat. The strategic placement of benches is equally crucial—positioning them in open, visible areas with good sightlines, rather than in secluded corners, naturally encourages shorter, more active use.
The philosophy behind these designs isn't to be hostile, but to guide behavior. The goal is to ensure public seating remains available for its primary purposes: resting for a few minutes, waiting for a bus, or having a brief chat. By thoughtfully considering form, material, and placement, cities can create welcoming spaces that serve the broader community's needs without becoming hubs for prolonged, stationary occupation. It's a balance between hospitality and functionality, ensuring public spaces are pleasant and accessible for all.