交通流量优化分析数据

通过路侧建设的摄像头、雷达等感知设备收集的车流数据生成能够辅助交通流量优化分析的数据。可帮助交通管理部门优化路口的红绿灯配时方案，制定科学的治堵方案，缓解交通拥堵。通过路侧建设的摄像头、雷达等感知设备收集到车辆的轨迹，经过加工处理，去除异常轨迹点位，生成交通流量数据。数据字段包括旅行时间（秒）、通行速度（千米/小时）、延误时间（秒）、通行效率（0-100区间， [0, 15) [15, 30) [30, 60) [60, 100]，分别对应拥堵、较堵、一般、畅通）、拥堵时长（秒）、拥堵里程（米）以及各个指标的置信度（0-100区间，越大可信程度越高）。首先置信度表示的是该指标的可信和准确程度。当前时间片的平均等待红绿灯的旅行时间表示车辆在特定时间片（例如，每5分钟或每15分钟作为一个时间片）内通过某一路段时，因等待红绿灯而额外增加的平均时间。当前时间片的平均不包含等待红绿灯的旅行时间：这个指标排除了等待红绿灯的时间，仅计算车辆实际在道路上行驶所需的时间。它是在没有红绿灯的情况下，车辆穿越特定路段所需的平均时间。与上述相同，通行速度指的是等待或不等待红绿灯时的车辆通过路口的速度，延误时间指的是车辆实际通过路口的时间和自由流行程时间之间的差值，通行效率指的是车辆经过路口的通过效率，公式为100 *（实际速度／稳定态速度），拥堵时长指的是某段时间内车辆拥堵的时间，拥堵里程指的是某段时间内车辆拥堵了多少公里。通过上述指标数据可以对路口信号灯的配时做出评价，及时调整信号灯配时，以保障交通通行效率。

Data supporting traffic flow optimization analysis is generated from vehicle flow data collected by roadside perception devices such as cameras and radars. This dataset can assist traffic management authorities in optimizing traffic light timing plans at intersections, formulating evidence-based congestion mitigation strategies, and alleviating traffic congestion.

Vehicle trajectories collected by roadside perception devices (e.g., cameras, radars) undergo preprocessing to remove abnormal trajectory points, thereby generating the final traffic flow dataset. The dataset includes the following data fields: travel time (in seconds), travel speed (in kilometers per hour), delay time (in seconds), traffic efficiency (ranging from 0 to 100, where intervals [0, 15), [15, 30), [30, 60), and [60, 100] correspond to severe congestion, moderate congestion, mild congestion, and unobstructed traffic flow, respectively), congestion duration (in seconds), congestion mileage (in meters), and the confidence score for each indicator (ranging from 0 to 100, with a higher value indicating greater credibility).

First, the confidence score indicates the reliability and accuracy of the corresponding performance indicator. The average travel time with traffic light waiting for the current time slice refers to the average additional time incurred by vehicles when passing a specific road segment within a given time slice (e.g., a 5-minute or 15-minute interval) due to waiting for traffic lights. The average travel time without traffic light waiting for the current time slice: this indicator excludes the time spent waiting for traffic lights and only calculates the actual travel time of vehicles on the road. It represents the average time required for a vehicle to traverse a specific road segment in the absence of traffic lights.

Similarly to the above definitions, travel speed refers to the speed at which vehicles pass through an intersection, regardless of whether they are waiting for traffic lights or not. Delay time is the difference between the actual time taken for a vehicle to pass through an intersection and the free-flow travel time. Traffic efficiency is defined as the passage efficiency of vehicles through the intersection, calculated using the formula: 100 × (actual speed / steady-state speed). Congestion duration refers to the total time during which vehicles experience congestion within a specified period, while congestion mileage refers to the total distance (in kilometers) that vehicles spend in congestion within the same period.

The above indicator data can be used to evaluate the timing plan of intersection traffic lights, enabling timely adjustments to the signal timing to ensure optimal traffic passage efficiency.

搜集汇总

背景与挑战

背景概述

交通流量优化分析数据是由德清县车网智联产业发展有限公司提供的企业数据，格式为CSV，包含9001条记录，按需更新。数据通过路侧感知设备收集，涵盖旅行时间、通行速度、延误时间等多个交通流量指标，用于优化红绿灯配时和缓解交通拥堵。