North Lombard Street Multimodal Safety Project Before-After Evaluation

Details

• Creators:
  Kothuri, Sirisha ; Anderson, Jason C. ; Yates, Elizabeth
• Corporate Creators:
  Oregon. Department of Transportation. Research Section
• Corporate Contributors:
  United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Before And After Studies Conflict Management Crosswalks Multimodal Safety Multimodal Transportation Pedestrian Areas Traffic Conflicts Traffic Speed Traffic Volume Transportation Safety Travel Time User Volumes Vehicle Throughput

  More +
• Publication/ Report Number:
  OR-RD-26-02
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Oregon
• Edition:
  Final Report
• Corporate Publisher:
  Oregon. Department of Transportation. Research Section
• Abstract:
  This report analyzes and summarizes the changes in conflicts, user volumes, speed, travel time, and vehicle throughput before and after a multimodal safety project on N Lombard St. Results show that changes in each metric were observed in the before and after conditions. The number of persons using crosswalks decreased between 2017 and 2019 and increased between 2019 and 2023. Comparing the overall crosswalk volumes between 2017 and 2023, there was a slight decrease. The majority of the crosswalk users in the before and after periods were pedestrians. Overall, 119 conflicts were observed with post- encroachment time (PETs) less than or equal to 5 sec and 39% had PETs less than or equal to 1.5 sec. There was a 25% reduction in conflicts overall in the after period compared to the before period. Average hourly speed and average hourly travel time experienced significant and oppositive effects in the after condition. Vehicle throughput was substantially reduced in the after period. Observations indicate that direction and time-of-day were primary factors when observed differences in the various metrics. Compared to similar segments, average hourly speed decreases and average hourly travel time increases were more on the segment in the project area. The report provides recommendations to consider when planning a before-after study.
• Format:
  PDF
• Funding:
  16292 23-04
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:91b1810dc4b0366f774c21eb519b7e216ef84cfe70cee4328d7b3e668de2b6884efbc4cdbfcd28df953f9e02118ddeee53f50ee7357653542332c81c6bf5dad1
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/89046/dot_89046_DS1.pdf
• File Type:
  [PDF - 9.08 MB ]