July 2014 St. Louis District Mobility Gateway Guide Transportation Management Center ZONING IN TMS Work Zones ♦ July 2013: 358 ♦ July 2014: 479 Work Zone breakdown: ♦ Major: 4 – 1.2% ♦ Moderate: 1 – 0.4% ♦ Minor: 310 – 98.4% Work zone crashes: 6 GuidePost Freeway mobility Improved overall compared to June consistent with the just over 1% decrease in the average 24 hour volume Freeway Volumes leveled off for the year after peaking last month but Still remain higher than last year by over 3% Arterial travel times remained fairly steady with some minor improvements along NB Route 141 in the PM and in the SB direction between I-64 and I-44 US 67 in the NB AM improved between I-64 and Mo 340 but declined in the SB AM between I- 44 and Mo 30. PM mobility remains low between I-70 and Route AC (New halls Ferry Road) in both directions Average incident Lane clearance decreased significantly Mobility Snapshot Freeway Mobility Minor Improvements in Both AM and PM Freeway Average 24 hour Volumes July 2013 July 2014 Increase of 3.6 % Major Incidents June 2014: 7 July 2014: 1 2013 Avg. 6.3 2014 Avg. 5.4 Average Incident Duration June July Lane Clearance: 25:35 21:51 Incident Clearance: 26:24 22:01 (Min: sec) Major Impact Work Zones June 4 July 4 Moderate Impact Work Zones June 0 July 1 Year to Year Mobility Comparison: July 2013 July 2014 Major impact WZ: Increased Moderate impact WZ: Increased Major incidents: Improved Freeway Mobility: Improved Trending UP Poplar Street Bridge Interchange reconstruction began in July, which will eventually improve mobility near the PSB.
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St. Louis District MobilityMobility Snapshot Freeway Mobility Freeway Average 24 hour Volumes July 2013 July 2014 Increase of 3.6 % Major Incidents June 2014: 7 July 2014: 1 2013 Avg.
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Transcript
July 2014
St. Louis District Mobility
Gateway Guide
Transportation Management Center
ZONING IN
TMS Work Zones
♦ July 2013: 358
♦ July 2014: 479
Work Zone breakdown:
♦ Major: 4 – 1.2%
♦ Moderate: 1 – 0.4%
♦ Minor: 310 – 98.4%
Work zone crashes: 6
GuidePost
Freeway mobility Improved overall
compared to June consistent with
the just over 1% decrease in the
average 24 hour volume
Freeway Volumes leveled off for
the year after peaking last month
but Still remain higher than last
year by over 3%
Arterial travel times remained
fairly steady with some minor
improvements along NB Route
141 in the PM and in the SB
direction between I-64 and I-44
US 67 in the NB AM improved
between I-64 and Mo 340 but
declined in the SB AM between I-
44 and Mo 30. PM mobility
remains low between I-70 and
Route AC (New halls Ferry Road)
in both directions
Average incident Lane clearance
decreased significantly
Mobility Snapshot
Freeway Mobility
Minor Improvements in Both AM and PM
Freeway Average 24 hour Volumes
July 2013 July 2014
Increase of 3.6 %
Major Incidents
June 2014: 7 July 2014: 1
2013 Avg. 6.3 2014 Avg. 5.4
Average Incident Duration June July
Lane Clearance: 25:35 21:51
Incident Clearance: 26:24 22:01
(Min: sec)
Major Impact Work Zones
June 4 July 4
Moderate Impact Work Zones
June 0 July 1
Year to Year Mobility Comparison:
July 2013 July 2014
Major impact WZ: Increased
Moderate impact WZ: Increased
Major incidents: Improved
Freeway Mobility: Improved
Trending UP
Poplar Street Bridge Interchange
reconstruction began in July, which will
eventually improve mobility near the PSB.
Work Zones
2
*Impact Levels described in Data Key
SL District Inspections:
♦ Jun 2014: 25%
♦ Jul 2014: 31%
♦ Goal: 50%
SL Mobility Rating:
♦ Jun 2014: 94%
♦ Jul 2014: 97%
♦ Goal: 91%
Visibility levels:
♦ Jun 2014: 87%
♦ Jul 2014: 84%
♦ Goal: 91%
Major Impact (15 Minutes or Above Additional Travel Time
7/11 (Friday) PM Eastbound I-44 from Memorial Drive to Washington Avenue – Full Closure
Full closure for Park Over the Highway work
18 minutes additional travel time experienced
All mitigation efforts were in full use
7/12 (Saturday) AM Eastbound I-44 from Memorial Drive to Washington Avenue – Full Closure
Full closure for Park Over the Highway work
30 minutes additional travel time experienced
All mitigation efforts were in full use
7/12 (Saturday) PM Eastbound I-64 at Kingshighway – Two Left Lanes Closed
Paving operation with lane shifts
18 minutes additional travel time experienced for initial setup
All mitigation efforts were in full use
7/19 (Saturday) PM Eastbound I-64 at Kingshighway – Two Left Lanes Closed
Paving operation with lane shifts
18 minutes additional travel time experienced for initial setup
All mitigation efforts were in full use Moderate Impact (10-14 Minutes Additional Travel Time) 7/31 (Thursday) PM Eastbound I-64 at Kingshighway – Two Left Lanes Closed
Paving operation with lane shifts
10 minutes additional travel time experienced for initial setup
All mitigation efforts were in full use
TMC Observed Work Zones July 2014
Level of Travel Time Impact Number of Work Zones
Major Impact 4
Moderate Impact 1
Minor Impact 310
Total 315
Work Zones
3
Work Zone Related Crashes With Mobility Impact 7/2 (Wednesday) AM Eastbound I-64 at Boone Bridge – Two Right Lanes Closed
A single vehicle rollover crash during morning rush
45 minutes of additional travel time experienced
All work zone temporary traffic control was in place
7/7 (Monday) AM Eastbound I-64 before Vandeventer Avenue – All Lanes Open
Overturned contractor dump truck
Caused debris to scatter over all four driving lanes
6.5 mile queue to Big Bend Boulevard
All work zone temporary traffic control was in place Note: There was also one TMA Hit on July 25, 2014. It was clipped by a Tractor Trailer with no injuries. All vehicles were driven from scene with no impact on mobility.
Work Zones
4
Incident Management
5
Incident Management
6
Denotes Location of Major Impact Traffic Incidents
July 2014 Incidents Map
Number of Major Impact Incidents
June 2014 vs. July 2014 (7) (1)
Number of Fatal Incidents June 2014 vs. July 2014
(2) (0)
Number of Tractor Trailer Incidents June 2014 vs. July 2014
(40) (27)
Legend
Number of Incidents 1 2 3 4 5 6+ Incidents Crashes
EB I-64 before
Vandeventer
Avenue
Interstate
May
Jun
e
July
I-270 151 184 135I-64 114 114 127I-70 141 139 121
I-55 76 105 67
I-44 110 101 67
I-170 52 26 32
Mo-370 20 20 18
Mo-364 14 12 5
Total 678 701 572
Number of Incidents
Incident Management
7
Major Impact Traffic Incidents and Mitigation
7/7/2014 (Monday)
Time: 8:41 am – 12:16 pm
Location: St. Louis City – Eastbound I-64 before Vandeventer Avenue
Event: Two vehicle crash involving a contractor dump truck that spilled its load
Estimated Initial Impact: A contractor dump truck carrying bricks, lumber and assorted materials overturned during the crash spilling cargo across traffic lanes. 4 of 4 travel lanes affected.
Action: MoDOT Emergency Responders and MoDOT maintenance crews set up a work zone and Motorist Assist and Maintenance crews stabilized the travel lanes. A Bobcat was used to remove spilled cargo and a tow crane used to upright the tractor trailer. St. Louis City Police and EMS responded to the scene assisting with traffic control and treating the two injured. TMC posted incident notifications on highway boards in advance of the incident and posted a notification on the traveler information map. MoDOT’s Work Zone Coordinator was notified along with Community Relations who contacted and informed the media.
Result: All eastbound lanes were closed. Traffic was moving on the right shoulder with a queue to Big Bend Boulevard. Traffic returned to normal flow 12 minutes after the incident cleared.
AM Peak Changes in July 2014 Mobility Improved Mobility Declined
*All weekdays are included in speed index calculation
B C
A
D
D
Freeway Management
10
Big Bend
Road
12
3
6
9
W/O
Woodlawn
12
3
6
9
Big Bend
Road
Freeway Management
11
Maryville
Centre
12
3
6
9
Maryville
Centre
12
3
6
9
W/O
Hampton Ave.
Freeway Management
12
PM Peak Changes in July 2014
Mobility Improved
*All weekdays are included in speed index calculation
A
A
C B
Freeway Management
13
12
3
6
9
Lindbergh
Blvd.
12
3
6
9
MO 340
Freeway Management
14
12
3
6
9
Maryville
Centre
Freeway Management
15
Readings from every detector on the interstates in the St. Louis District are used for this comparison. An average 24 hour volume value is determined for each route and direction per month. The average values are then combined for a total 24 hour volume. The values presented represent the number of vehicles on the district’s interstates on the average weekday for each month.
Arterial Management
16
New Arterial Travel Time Index
This is the fifth month attempting to report arterial travel times in a similar format to freeways. Data from MO Route 141 and US Route 67 are presented for in both the AM/PM peak for North and Southbound directions. An explanation of how this effort is being completed is included in the following paragraphs. Arterial mobility is measured by a travel time index, or TTI. The TTI for a segment of roadway over a peak period is calculated by dividing the average travel time by the expected travel time. The expected travel time is simply the length of the segment divided by the posted speed limit. Due to signalization of arterials, determining a true free flow speed is not practical. For this reason, the posted speed limit is used rather than the free flow speed. A value greater than 1.0 means the average travel time during the peak period is longer than the expected. Because arterial travel times are measured over a segment rather than at a point, the TTI charts display one index value for the entire segment. This means the TTI will be displayed as a straight line between measurement points rather than as a slope from one line to the next as shown on the freeway charts. The travel time indices being presented are the current month and the previous month. A comparison of the previous year will be added as soon as the information is available for analysis. Arterial mobility on MO Route 141 was introduced first, with US Route 67 the second of several instrumented arterial routes to be added in the future. Eventually, as more routes are added to the report, the arterial travel time index will be displayed on a color coded map similar to the freeway mobility map.
US Route 67
MO Route 141
Arterial Management
17
Arterial Management
18
Arterial Management
19
Arterial Management
20
Arterial Management
21
7/1 (Tuesday)
Location: Southbound I-170 ramp to Westbound MO 180
Event: Vehicle drove off of road into tree and shut ramp down
Time: 8:55 am – 10:17 am Total Time: 1 hour 22 minutes
Action: Signal at MO 180 @ I-170 was set to free to flush the traffic through. After the truck was
removed from the ditch, signal was set back to normal operation
Result: The adjustment moved traffic efficiently with no backups on either approach.
Vehicles were making illegal right turns from left turn lanes (but yielding to opposing left turn movement).
Arterial Management
22
Fair St. Louis Events
The City of St. Louis, St. Louis Metro Police Department, MoDOT, Forest Park Forever, Fair St. Louis and
Metro personnel met for several months to prepare for the July Fair St. Louis Events in Forest Park. The
group worked on a plan to mitigate traffic issues for the event including the interstates, major and minor
arterials and parking facilities. The city and MoDOT worked together on coordinating signals along multiple
corridors affecting ingress and egress over the three day event. The egress coordination plan was
implemented for testing Saturday morning June 28th at 5:30 a.m. The implementation went well with a few
fine-tuning adjustments that needed to be made. A traffic mitigation plan was also implemented that covered
the event dates and times from the open of the fair to the closing on July 5th with the fireworks.
Thursday July 3rd events:
The lane drop that was supposed to be on Forest Park Parkway (FPP) was incorrectly set up on Skinker
instead of FPP and the responsible traffic control company responded an hour later to correct the lane drop
issue. As a result, Skinker northbound traffic became congested and the AM plan (2/4/1) was implemented to
relieve congestion. The NB left turns on Kingshighway at Barnes Hospital and West Pine were eliminated at
3:00 p.m. to limit access into the park and to improve traffic progression on the corridor. Planned WB I-64
ramp closures at Hampton and Clayton/Skinker for the event were implemented between 3:30 p.m. and 4:30
p.m., at which time the SB left turn from Skinker to I-64 was eliminated to coincide with the on-ramp closure.
The traffic on Kingshighway and Skinker/McCausland was heavy between the hours of 3:30 - 5:30 p.m.,
which construed Thursday’s PM rush. As the PM rush was winding down, the signals at Kingshighway,
Hampton, and Skinker/Clayton were placed on the AM plan (2/4/1) to accommodate access into the park.
The signals at Kingshighway, Hampton, and Skinker/Clayton were switched over at 7:00 p.m. for the PM plan
(3/4/1) as traffic patterns switched from peak entry into the park to beginning to exit the park. The signals on
Lindell were switched over at 7:42 p.m. to the PM plan (3/1/1) (the normal plan was used vs. the egress plan
due to the planned lane drop not being deployed on WB I-64). The entry plan for I-44 WB off ramp at
Vandeventer was scaled back due to the lack of ramp traffic that was anticipated and the traffic queues on
Vandeventer. The fireworks ended at 10:18 p.m. and the exit from the park started. At 10:56 p.m. the signals
at Hampton and Skinker were switched to the exit plan (3/2/1) as traffic made it to the park exits to these
arterials. Full egress from the park completed at 11:22 p.m. and the egress traffic off of the arterial was done
at 11:45 p.m. and AM plan (2/4/1) was implemented for Kingshighway, Hampton, and Skinker/Clayton for
Friday’s events.
Arterial Management
23
Friday July 4th Events:
The command center opened at 08:40 a.m. and all city cameras started the day down due to a power outage
at Soldiers Memorial that caused the camera outage. The North/South arterials were already running AM
plan (2/4/1). The city camera system was back online and running at 10:00 a.m. The McCausland/Skinker
arterial had a large queue exiting from the parade at 12:02 p.m. therefore the arterial was placed on PM plan
(3/4/1). The inbound fair rush began at 7:26 p.m. The North/ South arterials were placed on AM plan (2/4/1),
which was able to hand the traffic volumes entering the fair. There was a gas main break discovered at 7:38
p.m. on SB Hampton @ West Park where one SB lane was temporarily closed until the work could be
postponed until overnight. The McClausland/Skinker arterial was placed on exit plan (3/2/1) due to heavy
pedestrian traffic at Forsyth at 9:11 p.m. The Kingshighway, Hampton and Forest Park Parkway arterials
were placed on exit plan (3/2/1) between 9:58 & 10:38 p.m. The fireworks show was on from 9:57 p.m. to
10:16 p.m. The Skinker/McClausland arterial egress was completed at 11:15 p.m. After the main park
egress, the Hampton arterial was placed on PM plan (3/4/1) to give more time to the NBL onto I-64 and less
delay for Oakland since the exiting traffic pattern switched from exiting the park to exiting via Oakland. Full
egress was completed at 11:39 p.m. and the North/South arterials were set to the AM plan (2/4/1).
Saturday July 5th Events:
The third day of the fair opened to the public at 12:00 p.m., at which time there was a heavy volume of
pedestrian traffic using the I-64 @ Hampton interchange, Skinker @ Lindell and Skinker @ Forsyth/Lagoon
where adjustments were made to accommodate the influx of pedestrians accessing the park via Metrolink.
The volume of traffic increased on the North/South arterials for fair entrance and the AM plan signal timing
was handling the traffic. The Kingshighway, Hampton and Forest Park Parkway arterials were placed on exit
plan (3/2/1) between 10:00 & 10:40 p.m. The fireworks show was from 10:00 p.m. to 10:21 p.m. The
Skinker/McClausland arterial egress was completed at 11:30 p.m.. After the park egress, the Hampton
arterial was placed on PM plan (3/4/1) to give more time to the NBL onto I-64 and less delay to Oakland
again. Full egress was completed by 11:30 p.m.
Conclusion:
The communication and cooperation between all agencies was highly effective in correcting glitches
and mitigating potential traffic related events during the Fair. The close coordination by all involved
helped traffic ingress and egress throughout this period resulting in a very successful holiday event.
Data Key
24
Level of Impact Additional Travel
Time Expected Mitigation Actions
Major (Red)
IAR Event
SEVERE DISTRESS
PRESENT
Return of roadway to free flow traffic is
Priority #1
15 minutes or above
TMC and field personnel
take all steps possible up to
and including removal of
lane closure to achieve free
flow threshold
Immediate Action Required
Supervisory mitigation
assistance is required using
the St. Louis District Work
Zone Resolution Ladder as
a tool to restore free flow
traffic threshold
Moderate (Yellow)
IAR Event
CAUTIONARY STAGE:
Action required by Field/ TMC to
prevent escalation to a major event
10 – 14 minutes
TMC increases driver
messaging. Field begins
efforts to restore free flow
traffic
TMC and field shall reach a
consensus on mitigation
success within 15 minutes
or less.
If a consensus cannot be
reached, mitigation should
be scaled upwards in
accordance with the St.
Louis District Work Zone
Resolution Ladder
Work Zones Whenever additional travel time is reported, this additional time shall be evaluated using this chart and adequate mitigation measures should begin within the parameters of this chart. TMC and field personnel are partners in the mitigation of traffic and notification of additional travel times should trigger the appropriate response from both parties. Chart is designed to be an additional travel time reference to establish parameters for gauging the travel impact through work zones and to provide guidance for taking mitigation actions. Travel times can be collected or reported via Blue Toad technology, field personnel, call reports, ITS, TMC cameras, etc. Major and Moderate impacts trigger an IAR (Immediate Action Required) event. IAR means work zone user and TMC partner together to take immediate actions to reduce or eliminate distress. During an IAR event mitigation procedures can range from increased driver notification up to and including removal of work zone. Additional mitigation procedures may require involvement of administration through use of the work zone resolution ladder. IAR event can be upgraded or downgraded as conditions change.
Data Key
25
Incident Levels
Major Impact Traffic Incident – Road closure > 2 hours Major traffic incidents are typically traffic incidents involving hazardous materials, fatal traffic crashes involving numerous vehicles, and other natural or man-made disasters. These traffic incidents typically involve closing all or part of a roadway facility for a period exceeding 2 hours. Moderate Impact Traffic Incident – Blocked travel lanes/closure 30 min – 2 hours Moderate traffic impact incidents typically affect travel lanes for a time period of 30 minutes to 2 hours, and usually require traffic control on the scene to divert road users past the blockage. Full roadway closures might be needed for short periods during traffic incident clearance to allow traffic incident responders to accomplish their tasks. Minor Impact Traffic Incident – Lane closures < 30 minutes Minor traffic incidents are typically disabled vehicles and minor crashes that result in lane closures of less than 30 minutes. On-scene responders are typically law enforcement and towing companies, and occasionally highway agency service patrol vehicles.
Definitions
511 – Gateway Guide’s phone line for automated call-in travel information in the St. Louis Metro Area
511 Floodgate Message – Road closure message sent from the TMC that is read at the beginning of a 511 call and posted to the banner on the website
ACTRA – Traffic signal management software program
Alert – Email message sent regarding an incident or event on the roadway
Arterial – Missouri State Highway Numbered Routes, not fully access controlled
Arterial Device – ITS equipment located along MoDOT arterials
Average Minutes per Mile – Number of minutes for a vehicle to travel one mile of roadway averaged over a section of roadway
BlueTOAD - a (Bluetooth Travel-time Origination and Destination) traffic monitoring system to collect high quality high density travel times by sampling a portion of actual travel times
Worst Time to Travel Clocks - The clocks found on the speed charts depict the progression of travel
speeds during the commute peak period at the worst congestion location along the route.
- For example, the clock on the left depicts conditions worsening at a particular location beginning at 6:30 a.m. with the slowest speeds between 7 a.m. and 8:15 a.m. Conditions improved at 8:45 a.m.
Data Key
26
DMS - Dynamic Message Signs along highway displaying incident and travel time information
Defined Sensor – A single sensor with an individual ID focused on a particular roadway; multiple defined sensors may be located at one physical sensor location
Driver messaging – Messages placed on DMS boards to alert drivers of incidents ahead of their direction of travel
EOC – Emergency Operations Center operated by MoDOT in Jefferson City
ER – MoDOT’s Emergency Response units that provide emergency assistance during nights and weekends typically not covered by Motorist Assist units
Freeway Device – ITS device located along a MoDOT freeway, such as interstates and other fully access controlled highways
Gatewayguide.com – Gateway Guide’s website for local St. Louis area traffic information
GuidePost – Area of report highlighting important mobility topics for the month
IDOT - Illinois Department of Transportation
KC Scout – Gateway Guide’s counterpart for the greater Kansas City Metropolitan area, a collaboration involving both MoDOT and the Kansas DOT
Mobility – Ease of movement over roadway, through system, and or work zone
MMU – Conflict monitor hardware installed at a signal system
MRB – Mississippi River Bridge under construction north of downtown St. Louis
Observed Work zone – Work zone tracked by traffic cameras at the TMC
Peak Average – Daily speed sensor readings over an entire weekday rush commute period averaged for an entire month
PSB - Poplar Street Bridge
Regional Mobility Overview – Map depicting congestion areas based on speed index ratings derived from speed sensor readings
Speed Index – a ratio of the speed at which vehicles travel during a period to the speed at free-flow conditions
Stats to Watch – Area of report highlighting interesting trends for the report month, or data to be closely followed
STLtraffic – Email group consisting of Gateway Guide personnel and Gateway Guide’s media partners, messages sent to the group are also posted on Twitter
TMC – Traffic Management Center (also referred to as Gateway Guide)
TMC Alert – Email alert sent to an internal group of Gateway Guide personnel
Data Key
27
VDS – Video Detection System, signal equipment used to detect vehicles at an intersection
Visibility- Concerning placement of traffic signs, signals, devices, barricades and warning lights for safety within work zone or construction area to help motorist and workers move within a work zone safely; Clearly visible and legible, distinguishable to approaching traffic during day and night, aligned with road user’s line of vision, and positioned as to not obstruct other applicable traffic control devices. Must meet MUTCD standards for condition and must be covered, turned or properly stowed when not in use.
Zoning In – section of report highlighting important construction topics for the report month