Assessing fire service accessibility on expressways under dynamic traffic conditions
Assessing the accessibility of fire services is crucial in optimizing the spatial distribution of fire stations and enhancing the overall level of fire services.In this paper,three fire service response time levels(10 min,20 min,and 30 min,including 1 min of action preparation time)are proposed in combination with the characteristics of expressways.Different fire service accessible intervals(0-540 s,＞540-1 140 s,＞1 140-1 740 s,and＞1 740 s)are classified accordingly.Subsequently,a time-weighted assessment model was developed to evaluate the indicators of fire service accessibility for expressways.To validate the effectiveness of the assessment model,the expressways in Changsha city were chosen as the research subject.The specific coordinates,including latitude and longitude,of 53 fire stations in Changsha were collected as the supply points for fire services.Likewise,the precise addresses and coordinates of 11 455 expressway interval points were meticulously documented as demand points.Leveraging an online mapping application programming interface,the response time and distance between these supply and demand points were accurately simulated and calculated considering the prevailing traffic conditions.Throughout a continuous week,a total of 169 assessment instances were established,resulting in a comprehensive sample size of 1 935 895.Based on the assessment outcomes,the overall accessibility of fire services on expressways in Changsha is calculated to be 48.46,indicating a"medium"level of fire services for the region.The visual representations of the findings reveal that expressway segments situated in rural,hilly,and mountainous regions,distanced from urban centers and border regions,predominantly fall within the fire service accessibility range of＞1 740 seconds.Conversely,the majority of expressway sections surrounding towns and cities are categorized within fire service accessibility intervals of＞540-1 140 s and＞1 140-1 740 s.In general,the capacity of Changsha expressways to manage fire hazards is moderate,highlighting the necessity to enhance the establishment of fire stations in areas of expressways that are either inaccessible or inadequately accessible for firefighting and rescue operations.This research provides essential theoretical and methodological support for enhancing the distribution of fire stations along expressways.
public safetyreal-time traffic conditionsexpresswayfire serviceaccessibility
万方数据
维普
