Traffic simulations have been carried out in the Portuguese town of Evora for two different traffic policies, the current situation and a hypothesized future system based on the adoption of traffic control measures in the town center. These simulations have allowed us to investigate the effectiveness of such a policy in terms of noise impact. In this study a methodology for the evaluation of noise impact has been defined and some suitable models selected from the literature. The calculation of noise pollution in the town of Evora has demonstrated that the closure of the town center to non resident traffic would lead to a great reduction in peak hour traffic flows, and consequently a decrease in the noise level of about 4.5 dBA at all sites measured, with the exception of the links leading to Lg. Portas de Moura where the decrease ranged from 3 to 4.3 dBA. It should be noted that the maximum decrease of the noise recorded in the town of Evora was equal to 7%. Most of the roads have a canyon shape and hence the reduction of traffic produces a very significant improvement in the acoustical conditions.
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机译：葡萄牙镇埃索拉镇的交通仿真是两种不同的交通政策，目前的情况和一个假设的未来系统，基于城镇中心的交通管制措施。这些模拟使我们能够在噪声影响方面调查这种政策的有效性。在本研究中，已经确定了评估噪声影响的方法，并从文献中选择了一些合适的模型。 evora镇噪声污染的计算表明，镇中心关闭了非居民交通的封闭将导致高峰时段交通流量的大幅减少，从而降低了所有网站的约4.5dBa的噪声水平测量，除了导致LG的链接外。 Portas de Moura在其中减少3至4.3 dBa。应该指出的是，在evora镇中记录的噪声的最大降低等于7％。大多数道路都有一个峡谷形状，因此交通的减少产生了声学条件的非常显着的改善。
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