Vertical Roads
VERTICAL ROADS
The floor of a jungle is not where most of its creatures live; they use the trees and vegetation to move up and down as well as to and fro . This makes it easier for them to keep out of one another's way.
Man, on the other hand. is still very much "on the jungle floor" as regards his travel by land, and we certainly have difficulty in keeping out of each other's way .Although we construct fly-overs and bridges to meet special problems they are very costly: for the most part we have to make do with "single-storey" roads . If somehow we could have multi-storey road systems without undue cost that would relieve congestion of traffic and at the same time cut down on the land area that has to be surrendered to the road makers .
The monkey in the jungle gives us a clue to the possibilities of multi-storey roads . This agile animal travels among the trees above ground level by a process of "grasp and let go" . No doubt he could do the same if provided with a series of vertical poles driven into the ground and spaced according to his reach; and if he had two lines of such poles, running in parallel close together, he would no doubt find it a help . Furthermore, a tribe of monkeys in several single files, one above the other, could use these poles together for mass travel .
It is not necessary to try this out with a lot of monkeys to conclude that we could, if we wished, design a power-driver (manned) machine to progress between the two lines of poles in a similar manner . Our machines would not have to have arms and hands to repeat the monkey's technique exactly: it would be simpler mechanically (and more comfortable for the driver) to have caterpillar tracks along each side of the machine (in the direction of run) which made contact with the inner sides of several pairs of posts at a time, so that when leaving one pair of posts a new pair would be engaged. The caterpillar tracks would be of substantial size, round and flexible. They would be made to rotate, at the will of the driver, so that the vehicle could move up and down as well as length-wise between the poles, thus enabling them to reach different levels, e . g . for overtaking.
To help in visualizing these vertical pole roadways, the following are some rough tentative dimensions:- Spacing between lines of poles (and distance between outer faces of the caterpillar tracks), 6feet. Spacing between lines of poles on the run, 4feet . Length of caterpillar tracks, 16feet. Maximum height of vehicles, 5feet. Poles to be embedded in the ground and then rise from 10 to 50feet according to number of traffic lanes required. Minimum height from ground to underside of vehicles, 8feet - to provide a pedestrian pathway at ground level (which could be roofed).
So far we have considered only one-way traffic . Two-way traffic could be arranged by erecting a third line of similar poles parallel to the first two, offset by the standard distance of 6feet . More than two traffic lines, as seen in plan, would rarely be required because each run of paired poles would provide for a number of superimposed traffic lanes. A total width of 20feet of ground would be sufficient for 6 or more traffic lanes.
The new vehicles would have smooth surfaces top and bottom, and these would be tapered to horizontal wedge form at front and rear to minimize overtaking hazards .
A system of "points" would allow for road junctions, and for cars to enter the pole-road system .
Multi-storey roads of this kind, besides accommodating many more vehicles than single-storey roads, could also have certain advantages as regards economy and flexibility in road making. The natural ground surface would be undisturbed except for driving in the poles and laying the pedestrians' pathway. The slope and nature of the ground would be relatively unimportant, thus simplifying the routing of roads and avoiding cuttings and embankments. Pole roads could be readily taken up and re-positioned for new routes, and the capacity of any given roadway could be increased by adding height to poles already in service .
from SUNDRY THOUGHTS AND INNOVATIONS
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by
F . L . Barrow