‘Impact’

Eight-Car Trains on Metro is Equivalent to Widening I-66 in Arlington by Two Lanes

July 14th, 2014 8 comments

Adding two extra cars to a six-car Metrorail train might not seem like much, but it is equivalent to widening I-66 through Arlington by two lanes. Plus, it’d likely be cheaper and faster for commuters, too.

Sometimes it’s hard to wrap one’s head around how just many people Metrorail can move. But where Metrorail operates in heavily congested corridors, seemingly small improvements can yield big results. In fact, matching the capacity of all eight-car trains system-wide would require 16-18 lanes of freeway into downtown, each way.

Orange Line Metro train from I-66. (Photo by wfyurasko, click for original)

To match the capacity of eight-car trains on Metro, we’d have to widen I-66 in Arlington by at least two lanes. (Photo by wfyurasko, click for original)

In Arlington for instance, going to eight-car trains on the Orange Line as part of Metro 2025 is like widening I-66 by two lanes.  Let’s do the math:

  1. One lane of highway can move around 2,200 cars per hour, at its theoretical maximum.
  2. Today, every morning Metrorail runs about 18 trains per hour eastbound on the Orange Line through Arlington, and about a third are scheduled eight-car trains. That’s a train every three minutes, and equates to around 121 rail cars per hour, or 12,060 passengers per hour.
  3. By 2025 with eight-car trains, Metrorail will be able to run 21, eight-car trains per hour eastbound on the combined Orange and Silver Lines, which equates to 168 cars per hour.
  4. This means Metro 2025 will bring the line’s capacity to 16,800 riders per hour, or an increase of 4,740 passengers per hour.
  5. To accommodate 4,740 more people on I-66 at 2,200 cars per hour, 2 people per car, we’d need 4,740 / 2 / 2,200 = 1.1 highway lanes in each direction.

That means we’d need at least two new lanes on I-66 to match the capacity of Metro 2025. In addition, eight-car trains would be cheaper, and would likely move people faster through the corridor.

  • Eight-car trains on Metro would be over two times cheaper: the estimated cost to widen I-66 works out to about $3.50 per rush-hour trip over the life of the project, whereas Metro 2025 would be about $1.50.
  • Metrorail would likely move travelers faster than I-66 in the end.  Orange Line trains today normally run at around 35 miles per hour, while congested travel speeds on I-66 average around 18 miles per hour. While new highway lanes might move cars faster at first, the improvements would eventually be eroded by growing congestion.
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Yesterday’s Metrorail Ridership: Recovering from a Snowstorm

March 5th, 2014 3 comments

Yesterday, as everyone recovered from a snowstorm, here’s what happened to Metrorail ridership.

After Monday’s snowstorm, yesterday the federal government in the Washington region issued a two-hour delayed opening, and many schools opened with a delay or remained closed. Metrobus began the morning operating on a snow emergency plan, but by afternoon had restored full service.  Here’s what that meant to Metrorail ridership:

Metrorail ridership on Tuesday, when the federal government and many schools opened with a 2-hour delay.

Metrorail ridership on Tuesday, when the federal government and many schools opened with a 2-hour delay.

Note: the prior Thursday (Feb. 27, 2014) stands in as a typical weekday above, for comparison.

It looks as if the apex of the AM peak period occurred 15 minutes later than usual.  Many riders appeared to delay travel in the morning, resulting in a much more gradual end to the morning peak.

How was your commute different on March 4?

This data is available for download (.xlsx, 13kb).

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Ridership Increases Expected for Cherry Blossom Festival

February 27th, 2014 2 comments

During the National Cherry Blossom Festival, Metrorail ridership increases on average by 7% on weekdays  and 50% on Saturdays. 

Metrorail ridership is impacted by a variety of factors, from special events to weather to government shutdowns.  One event that brings visitors to the region — and to Metrorail — in droves is the annual National Cherry Blossom Festival.   In anticipation of this year’s festival, we performed some analysis on how, when and where the blossom viewers impacted ridership on the Metrorail system.

In general, Metrorail ridership increases on average by 7% on weekdays and up to 53% on Saturdays during the festival.  On days with nice weather, ridership has increased up to 10% on weekdays and 70% on Saturdays!

As the figure below shows, during the weekdays there is no impact in the morning, a large (21%) increase of activity during the mid day and then a 7% increase thereafter.

Saturdays are another story all together.  Ridership increases up to 63% during mid day and afternoon periods on days during the festival, with a total ridership increase above 50%.  Even morning and “late” night ridership increases significantly during this period.

Cherry-Chart-Weekday-Saturday-w-Chart-2

Metrorail system entries by quarter-hour interval, Regular Weekday, Cherry Blossom Weekday, Regular Saturday and Cherry Blossom Saturday. Click chart for larger version.

 

When looking at change in ridership by station in the maps below, some obvious conclusions can be drawn. Read more…

Metro 2025 Means Business – Lots of it…

February 4th, 2014 1 comment

Without Metro 2025, the region might give up more jobs than the current size of 80 of the nation’s 100 largest downtowns.

One way to alleviate congestion – limit transit funding and stymie job growth!

The Washington, D.C. region earned in 2012 the unfortunate honor of being named the #1 region in the nation – for congestion. For the workers in this region this comes as no surprise, as seemingly endless “volume delays” litter our evening traffic reports, commuters spend more than a full week and a half sitting in traffic each year, and even the public transit network – primarily Metrorail – is so crowded that commuters often have to wait for multiple trains just to squeeze onto the system. And unless proposed transportation investments keep up with projected household and job growth – MWCOG projects that the region will add 1.6 million jobs by 2040 – these commutes are only going to become more painful.

We all know that the high price of congestion is in the billions of dollars per year, a figure that would be even higher but not for transit’s impact has in reducing the region’s congestion by 10 to 15 percent, saving commuters time and money stuck in traffic, and preventing the need to build hundreds of thousands of new parking spaces and 1,000 additional lane miles of roads.

But that price pales in comparison to what may be if we don’t act now to make meaningful improvements to the regions congestion-reducing transportation infrastructure, especially in programs like Metro 2025. Turns out that we now know that when regions exceed 35 to 37 hours of delay per commuter per year – about four and a half minutes per one way free flow trip – regional job growth begins to slow. That means that expectations of continued economic growth in the region are a lot less rosy when we consider that we currently run about 72 hours of delay per commuter per year – and rising. And before you dismiss this as planning theory, remember that Hewlett Packard showed Atlanta and the nation in 1998 that congestion’s negative impact on employment growth can be economic fact. Read more…

Three Reasons for Faster Buses

December 10th, 2013 5 comments

Priority treatments speed up buses, which saves everyone time and money, uses street space most efficiently, and attracts development.

Bus priority projects, such as those begun through the regional TIGER grant and included in the Metrobus Priority Corridor Network Plan, will improve travel times, increase service reliability, and attract thousand of new riders once fully implemented.

But let’s step back for a moment.  Why are these improvements needed?

November2009_AMSpeedMap (cropped)

Average AM Rush Hour Bus Speeds (Nov. 2009)

Read more…

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Metrobus Carries the Load on 16th Street

November 4th, 2013 7 comments

During the morning rush hour, Metrobus carries 50% of all of the people traveling on 16th Street NW towards downtown DC, despite using just 3% of the vehicles. However, it still gets stuck in traffic.

It will come as no surprise to regular riders of the Metrobus S1,2,4 (PDF), or MetroExtra S9 (PDF), but ridership has grown tremendously in recent years on 16th Street, from just over 16,000 riders per weekday in 2008 to about 20,500 this year.  To keep pace, Metro has added lots of new service, most notably the S9 limited stop service in 2009.

In fact, Metro has added so much rush hour service on lower 16th Street that buses headed towards downtown DC now operate more frequently than any transit service in the region, including Metrorail, with buses arriving an average of nearly every 90 seconds.

 

16th Street Throughput Chart

Read more…

Draft Greenhouse Gas Calculator for Review

October 28th, 2013 No comments

Metro requests feedback on draft Greenhouse Gas (GHG) calculator.

As part of the 40 Days of Momentum, a recent blog post the importance of Metro to the region, including greenhouse gas (GHGs) emissions reductions.   Now it is your turn to look up your share of those GHG reductions.

Please try out our draft Greenhouse Gas Calculator, which asks for a starting and ending address, and then routes your trip via automobile and transit and displays the route and GHG emissions differences.*   We are soft-launching this tool to crowd-source  the quality assurance process and assess its usefulness.

Launch the GHG Emissions Savings Calculator!

What other features would you like to see?  Did the tool accurately portray your travel choices?  What is the difference in GHGs between driving and transit for your most frequent trip?

* Note on GHG calculations: the tool uses the Google Directions API to route your trip using both automobile and transit. The Google Directions API response includes each step of the journey, including mode and distance. We apply standard rates of GHG emissions per mile to the different modes used. As an added bonus, if your transit trip includes walking, we toss in an estimate of the calories you burned too!

NPR Story on Arlington County’s Successes and Importance of Metro

October 25th, 2013 2 comments

NPR’s Morning Edition yesterday highlighted Arlington County‘s success in tackling commuting challenges, particularly as a result of the decision to bring Metrorail and transit-oriented development to the Rosslyn-Ballston corridor.  

When the Metrorail system was initially designed in the early 1960s, the plan proposed running the Orange Line in the median of what would ultimately become Interstate 66. Arlington County officials lobbied hard and put forward county funds to bring the Orange Line to its existing home, under Wilson Boulevard. They foresaw the benefits of high capacity transit IN the neighborhoods, as opposed to adjacent to the neighborhoods. They also set forth zoning, planning, and other policies to ensure that the county would maximize the benefits from that decision. The NPR story talks about the results of those decisions, the shift from a post-World War II auto-dependent suburb to a vibrant, mixed-use community that has become the gold standard for many cities across the world.

Orange Line - Proposed and Actual Alignments

Orange Line – Proposed and Actual Alignments

For more background on the history, growth, and experience with transit-oriented development in the corridor, check out this powerpoint from the Arlington County Department of Community Planning, Housing and Development. Not only does it provide additional information, it has some terrific before and after photos of the different Arlington neighborhoods and how they have changed. Parkington, anyone?

If you’d like to contribute to the NPR series, you can share your commuting experience with Morning Edition – #NPRcommute.

Yesterday’s NPR story was the first in a multi-part series on how communities are tackling commuting challenges.

Survey Confirms: Metro Means Business

August 8th, 2013 No comments

Recent surveys of leaders of the Washington-area business community show the current and growing importance of Metro to the region’s prosperity and competitiveness.

In March of 2013, an invitation to an online survey was sent to approximately 6,000 leaders of the Washington-area business community, including members of the DC Chamber of Commerce and the Greater Washington Board of Trade.   Respondents were asked a variety of questions to gauge their perceptions of the important of Metro in succeeding in many aspects of business, including the general importance of Metro to businesses in the region.

Respondents were in agreement about the importance of Metro DC metropolitan region businesses today and in the future.

Respondents were in agreement about the importance of Metro D.C. metropolitan region businesses today and in the future.

Read more…

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A World Without Metro, Part 1: I-395 Traffic

February 19th, 2013 No comments

Metro’s new strategic planning process, Momentum, articulates a vision for the the next generation of Metro.  One way to illustrate Metro’s vital role in the region’s transportation network is to show the impact of not having Metro.  This series will give perspective on the many real benefits that Metro conveys to the region today.

Metrorail’s Yellow Line crosses the Potomac from Virginia into DC parallel to I-395′s 14th Street Bridge.  Both the rail and highway bridges move large numbers of people into the regional core during the morning rush hour.   Between the two inbound spans, the 14th Street Bridge has six  lanes.  The Yellow Line provides the equivalent of three additional lanes.  This math is pretty simple:  one lane of freeway traffic can move about 2,420 people per hour (2,200 vehicles per hour times an average auto occupancy of 1.1 people per car) and the Yellow Line moves around 7,400 passengers from Pentagon to L’Enfant Plaza during the peak AM hour.   Another way to see it is that the Yellow Line removes 6,700 (7,400 pax / 1.1 pax per car) cars from the road.

What would happen to I-395 if some or all of the in-bound Metrorail Yellow Line customers switched to driving in the morning?  

If only 5% of Yellow Line customers drove up the freeway to the 14th Street Bridge during the AM peak hour, I-395 would fill with stop-and-go traffic for ten miles.

Map illustrating regularly recurring three-mile queue and the 10-mile queue that would regularly form if only 5% of the inbound AM commuters on the Yellow Line across the Potomac River switched to driving.

Map illustrating regularly recurring three-mile queue and the 10-mile queue that would regularly form if only 5% of the inbound AM commuters on the Yellow Line across the Potomac River switched to driving.

How is this possible?

Read more…

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