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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). Visit the full Congestion Subject Index.

Congestion on State Highways
Subject/Topic 20132014 2015 2016 
Before & After case studies13/Q214/Q215/Q3 
Congestion Dashboard13/Q214/Q215/Q3 
Congestion measurement principles13/Q214/Q215/Q3 
Construction traffic mitigation    
Corridor Capacity Analysis    
        Amtrak Cascades  15/Q3 
        Ferries13/Q214/Q215/Q3 
        Interstate 513/Q214/Q215/Q3 
        Interstate 9013/Q214/Q215/Q3 
        Interstate 40513/Q214/Q215/Q3 
        South Puget Sound Interstate 513/Q214/Q215/Q3 
        Spokane Region Interstate 9013/Q214/Q215/Q3 
        State Route 16713/Q214/Q215/Q3 
        State Route 52013/Q214/Q215/Q3 
        Tri-Cities US 395 corridor  15/Q3 
        Vancouver region I-5 & I-20513/Q214/Q215/Q3 
Cost of commute congestion13/Q214/Q215/Q3 
Data collection13/Q214/Q2  

Economic factors that affect travel times
13/Q2
13/Q4
14/Q2
14/Q4
15/Q2
15/Q3
 
Executive Summary of measures & results13/Q214/Q215/Q3 

Factors affecting recurring & nonrecurring congestion

 
   
Fatal collisions statewide & in the Puget Sound area    
Freeway HOV & HOT lane system13/Q214/Q215/Q3 


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


14/Q2


 
 
High Occupancy Vehicle (HOV) lanes    
        Lane miles added13/Q214/Q2  
        Lane reliability on major Puget Sound commute routes
13/Q2

14/Q2

15/Q3
 
        Person throughput: HOV vs. general purpose lanes13/Q214/Q215/Q3 
        Relationship to transit ridership13/Q214/Q215/Q3 
        Travel times on major Puget Sound commute routes13/Q214/Q2  
        User volumes & compliance    
Highway speed thresholds for congestion measurement13/Q214/Q215/Q3 
Intelligent Transportation Systems (ITS)13/Q214/Q2  
Key congestion performance measures13/Q214/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 delayed13/Q214/Q215/Q3 
Results Washington: Congestion measures13/Q214/Q215/Q3 
Severe Congestion by Duration & Frequency    
        On Central Puget Sound commute routes13/Q214/Q215/Q3 
        On Central Puget Sound commute routes13/Q214/Q215/Q3 
Throughput productivity at select Puget Sound locations13/Q214/Q215/Q3 

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

15/Q2
 
Travel Delay    
        Cost of travel delay13/Q214/Q215/Q3 
        On major Puget Sound commute routes13/Q214/Q215/Q3 
        On Snoqualmie Pass13/Q2   
        On state highways by urban area13/Q214/Q215/Q3 
        Statewide13/Q214/Q215/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 routes13/Q214/Q2 15/Q3 
        On Southwest Washington (Vancouver area) 
        commute routes

13/Q2 

14/Q2

15/Q3
 
        On uncongested commute routes13/Q214/Q215/Q3 
Vehicle Miles Traveled    
        Annual & per capita on all public roads &
        state highways

13/Q2

14/Q2

15/Q3
 
        On major Puget Sound commute routes13/Q2   
        On state highways by urban area    

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