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Asked by aajb355 to Cheryl, Christina, Daniel, George, Ivy on 17 Jan 2017.
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Christina Obiero answered on 17 Jan 2017:
As we learned in biology, trees require sunlight in order to produce glucose (energy) for growth from carbon dioxide and water. Hence the direction of growth is mainly influenced by this. The type of tree also determines how it will grow since some trees spread their branches wider than others. I do not think the road has a role to play in how certain trees grow.
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Cheryl Andisi answered on 17 Jan 2017:
Halo aajb355,
I agree with Christina’s explanation.
Another possible explanation, especially for trees that have low hanging branches could be the same effect as that described for fast moving trains- which might be a myth 🙂
If this train myth is an explanation, it would mean that vehicles, especially at high speed create a vacuum that will force the trees (and air) to move in in order to fill the vacuum -
George Mochamah answered on 17 Jan 2017:
Oh what did our biology teacher mark right? I guess now..two resoans: one they are phototrophic–they bend towards the road because there is not light competition on that side. But the one I believe most is that, when cars pass, there is a ka-vacuum created and so the trees are pulled. that continuous pulling overtime causes permanent deformity on the stem and hence grow that way. Oh the tree may be hiking a lift! Just kidding
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