Perimeter control is used to regulate transfer flows between urban regions. The greedy control (GC) method takes either the minimum or the maximum for the control inputs. Although it has the advantage of simplicity for real-time feasibility, a few existing studies have shown that it can sometimes have negative impacts because of unnecessary transfer flow restrictions. To reduce unnecessary restrictions, this study provides a method that gives flexibility to ease the strict conditions of the conventional GC. First, we propose a modification as a way of granting exceptions to the flow restriction under specific conditions. Second, we develop an algorithm to determine the threshold dynamically for accepting the exception, by comparing the possible outflow loss of the subject region and the possible outflow gain of its neighboring regions. The test results show that this flexible greedy control can handle the balance between the transfer demands and the greed of regions for securing the supply level, while increasing the performance in both vehicle hours traveled and trip completion.

周边控制用于调节城市地区之间的转移流量。贪婪控制（GC）方法采用控制输入的最小值或最大值。尽管它具有简化实时性的优点，但现有的一些研究表明，由于不必要的传输流量限制，它有时可能会产生负面影响。为了减少不必要的限制，本研究提供了一种方法，可以灵活地缓解常规GC的严格条件。首先，我们提出一种修改方案，作为在特定条件下授予流量限制例外的一种方式。其次，我们开发了一种算法，通过比较对象区域的可能流出损失和其邻近区域的可能流出增益来动态确定接受异常的阈值。