:::: One-line Brief//
Luminous road ribbons work in fog and make starry nights vivid.
:::: Inspiration from Nature//
Spittlebug (Aphrophora Cribrata) excretes foam which repels its predators but is not toxic.
:::: Problem Statement//
A cat’s eye, retro-reflective device, is an obsolete method of road safety. Not only its protrusion damages a tire but it also depends upon an incident beam to work. To compensate for its little functionality, street light poles are installed which maybe 30 to 100 feet apart (distance between two poles is calculated based on the luminary value of the bulb and pole details). And yet this road safety system fails in a dense-fog condition (when visibility is reduced to 1/4th of a mile or less). Furthermore, this combination of solutions requires too much material and infrastructure for a rather simpler task, visibility. We need a new model, a singular system of road safety which works under all climatic conditions.
:::: Nature Review//
The central issue here is to provide drivers with both visibility and safety. Different tactics, behaviors, and processes were sought in the natural world where an organism repels another either by an activity or a biochemical process. A remarkably fitting situation was found in the insect world. A spittlebug nymph called Aphrophora Cribrata excretes a foam from its body which is non-toxic but comprises chemicals that repel its predators. The prizing outcome of such a fragile and fleeting function is life. There are three important factors in this defense mechanism:
1. It works as a function of behavior as opposed to physical defense. The composition of the foam, though reproachful to the predator, is non-toxic. Had it (predator, usually an ant) decided to get through the foam, its nice little meal would easily have been trapped on a branch with nowhere else to go.
2. It is a temporary defense mechanism.
3. A spittlebug functions as an autonomous manufacturing plant. Chemical processes in spittlebug take place at regular outside temperature and pressure. It has full control over the path and extent of production of the foam.
:::: Technology Review//
Foam formation turns out to be a rather controllable phenomenon. Architects and mathematicians have produced underlying rules and geometries of soap-bubble formation and proliferation. This, along with the innovation in luminescent materials direct us towards a singular solution to road visibility and safety. Please check out the links in the technology montage for reference.
:::: Nature Gadget//
Road lines are dug and filled with tubes that produce luminescent foam. They can replace cat eyes, street lights, and water drainage systems. A thin continuous covered channel is proposed (6) which runs along the path as a road line (19). It contains foam-generating devices (13) filled with luminescent fluids (22). Small water nozzles (9) clean up the channel from inside. Such visibility channels would replace all the light poles and road studs etc. And as a synergistic reward, these luminous channels will help us get rid of some of the light pollutions we have been creating ceaselessly. With these new channels perhaps, we might be able to locate ourselves past our destination on road, into the universe under a starry sky.
:::: Citation Montage//
The following are some useful resources from the design process of this nature gadget.
Row1Column1: A Pine Spittlebug
Row1Column2: Pine Spittlebug’s Larva
Row1Column3: An Example of Fog-related Traffic Problems
Row2Column4: Phospholipids Aqueous Solution Structures
Row2Column1: Membrane Rearrangement, Drainage, and Rupture in a Cluster of Soap Bubble
Row2Column2: Bubble Constructions Using a Wand and a Straw
Row2Column3: Frei Otto’s Experiments with Soap Bubbles
Row2Column4: Mathematical Shape “Catenoid” Made of a Soap Film
Row3Column1: Water Cube
Row3Column2: Mathematics of the Surface Area of Soap Bubble
Row3Column3: An Example of Luminescent Soap Material
Row3Column4: Glow-in-the-dark Cosmetic Pigment
Row4Column1: Temperature and Humidity Sensor
Row4Column2: A Biodegradable Foam Created from Milk and Clay
Row4Column3: Bioluminescent Fog for Military and Law Enforcement
Row4Column4: Road Rainwater Collection
Created by Umair Zia