English vocabulary高手进

探讨一个问题，城市公共交通，使用city public communication好还是ciuty public transport好？也就是，who能给我分析一下communication和transport以及transportation之间用法上细微的差别，不胜感激！

1）用google搜索得到的查询结果分别为：
public transport：3,450,000个
public transportation: 1,890,000个

2）google确实有些时候不足以为信，那么我们看看美国最权威的词典Merriam_Webster的解释：
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transport:
Date:1611
1 : an act or process of transporting : TRANSPORTATION
2 : strong or intensely pleasurable emotion *transports of joy*
3 a : a ship for carrying soldiers or military equipment b : a vehicle (as a truck or airplane) used to transport persons or goods c : TRANSPORTATION 3
4 : a transported convict
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transportation:
Date:1540
1 : an act, process, or instance of transporting or being transported
2 : banishment to a penal colony
3 a : means of conveyance or travel from one place to another b : public conveyance of passengers or goods especially as a commercial enterprise
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从transport之下的第一条释义可看出，transportation与其用法相似，综合google分析，trasnport现在似乎更常用。