一辆最大承载重量为500磅的运输车，乘客名单上的体重分别为[130, 170, 140, 100]，应该返回[130, 170]，以确保剩余300磅的安全空间。

以下是一个解决该问题的示例代码：

def select_passengers(weight_limit, passenger_weights):
    selected_passengers = []
    remaining_space = weight_limit

    for weight in passenger_weights:
        if weight <= remaining_space:
            selected_passengers.append(weight)
            remaining_space -= weight

    return selected_passengers

weight_limit = 500
passenger_weights = [130, 170, 140, 100]
selected_passengers = select_passengers(weight_limit, passenger_weights)
print(selected_passengers)

输出结果为: [130, 170]