求翻译：对历史街区路外停车设施规划研究则是通过综合考虑尽可能缩短居民驾车出行成本、提高出行服务水平、绿色低碳节能环保出行，以及对适合历史街区路外停车设施规划选址的相关参数及三个约束限定条件重点分析从而提出了以广义距离之和最短、广义费用之和最低、总泊位供应量最大为目标函数的路外停车设施规划选址模型，是什么意思？

On -street parking facilities outside the historic district planning study is to shorten as much as possible by considering the residents travel by car costs, improve service levels to travel , green travel, low-carbon energy and environmental protection , and related parameters for road parking out

The historic district, Road parking facilities planning study is through the comprehensive consideration as far as possible reduce residents traveling by car costs, improve travel service level, green low-carbon energy-saving and environmental travel, as well as the suitable for historic district, R

Stops the facility plan research to the historical block road outside is reduces the inhabitant through the overall evaluation to drive as far as possible the journey cost, the enhancement journey service level, the green low-carbon energy conservation environmental protection journey, thus as well

On history blocks road outside parking facilities planning research is is through integrated considered as shortened residents driving travel cost, and improve travel service level, and green low carbon energy environmental travel, and on for history blocks road outside parking facilities planning l

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