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Gray Notebook Subject Index: Congestion

The table below lists subjects included in the most recent four years of the Gray Notebook (2013-2016). For the full Congestion Subject Index, click here.

Congestion on State Highways
Subject/Topic 2013 2014 2015 2016 
Before & After case studies 13/Q2 14/Q2 15/Q3  
Congestion Dashboard 13/Q2 14/Q2 15/Q3  
Congestion measurement principles 13/Q2 14/Q2 15/Q3  
Construction traffic mitigation        
Corridor Capacity Analysis        
        Amtrak Cascades     15/Q3  
        Ferries 13/Q2 14/Q2 15/Q3  
        Interstate 5 13/Q2 14/Q2 15/Q3  
        Interstate 90 13/Q2 14/Q2 15/Q3  
        Interstate 405 13/Q2 14/Q2 15/Q3  
        South Puget Sound Interstate 5 13/Q2 14/Q2 15/Q3  
        Spokane Region Interstate 90 13/Q2 14/Q2 15/Q3  
        State Route 167 13/Q2 14/Q2 15/Q3  
        State Route 520 13/Q2 14/Q2 15/Q3  
        Tri-Cities US 395 corridor     15/Q3  
        Vancouver region I-5 & I-205 13/Q2 14/Q2 15/Q3  
Cost of commute congestion 13/Q2 14/Q2 15/Q3  
Data collection 13/Q2 14/Q2    

Economic factors that affect travel times
13/Q2
13/Q4
14/Q2
14/Q4
15/Q2
15/Q3
 
Executive Summary of measures & results 13/Q2 14/Q2 15/Q3  

Factors affecting recurring & nonrecurring congestion

 
     
Fatal collisions statewide & in the Puget Sound area        
Freeway HOV & HOT lane system 13/Q2 14/Q2 15/Q3  


High Occupancy Toll (HOT) lanes
13/Q1
13/Q2
13/Q4


14/Q2


 
 
High Occupancy Vehicle (HOV) lanes        
        Lane miles added 13/Q2 14/Q2    
        Lane reliability on major Puget Sound commute routes
13/Q2

14/Q2

15/Q3
 
        Person throughput: HOV vs. general purpose lanes 13/Q2 14/Q2 15/Q3  
        Relationship to transit ridership 13/Q2 14/Q2 15/Q3  
        Travel times on major Puget Sound commute routes 13/Q2 14/Q2    
        User volumes & compliance        
Highway speed thresholds for congestion measurement 13/Q2 14/Q2 15/Q3  
Intelligent Transportation Systems (ITS) 13/Q2 14/Q2    
Key congestion performance measures 13/Q2 14/Q2    
Moving Ahead for Progress in the 21st Century (MAP-21): Capacity-related reporting requirements  
13/Q2

14/Q3

15/Q3
 
Moving Washington: WSDOT's strategies to fight congestion        
        Add capacity strategically        
        Balanced strategies        
        Manage demand        
        Operate efficiently        
Percent of state highway system congested or delayed 13/Q2 14/Q2 15/Q3  
Results Washington: Congestion measures 13/Q2 14/Q2 15/Q3  
Severe Congestion by Duration & Frequency        
        On Central Puget Sound commute routes 13/Q2 14/Q2 15/Q3  
        On Central Puget Sound commute routes 13/Q2 14/Q2 15/Q3  
Throughput productivity at select Puget Sound locations 13/Q2 14/Q2 15/Q3  

Traffic volumes at selected locations
 
13/Q4
14/Q2
14/Q4

15/Q2
 
Travel Delay        
        Cost of travel delay 13/Q2 14/Q2 15/Q3  
        On major Puget Sound commute routes 13/Q2 14/Q2 15/Q3  
        On Snoqualmie Pass 13/Q2      
        On state highways by urban area 13/Q2 14/Q2 15/Q3  
        Statewide 13/Q2 14/Q2 15/Q3  

Travel time trends semi-annual update
13/Q1
13/Q4
14/Q2
14/Q4
15/Q2
15/Q4
 
Travel Times & Reliability        
        On Eastern Washington (Spokane Area) 
        commute routes

13/Q2

14/Q2

15/Q3
 


        On major Central Puget Sound commute routes
13/Q1
13/Q2
13/Q4

14/Q2
14/Q4

15/Q2
15/Q3
 
        On South Puget Sound commute routes 13/Q2 14/Q2  15/Q3  
        On Southwest Washington (Vancouver area) 
        commute routes

13/Q2 

14/Q2

15/Q3
 
        On uncongested commute routes 13/Q2 14/Q2 15/Q3  
Vehicle Miles Traveled        
        Annual & per capita on all public roads &
        state highways

13/Q2

14/Q2

15/Q3
 
        On major Puget Sound commute routes 13/Q2      
        On state highways by urban area        

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