Peachtree Road Bike Lanes - The Facts, and Nothing But the Facts -Jim Durrett (Atlanta: neighborhoods, construction)

[jsvh]

Jim Durrett shares his take on Peachtree Road redesign - SaportaReport

“Peachtree Road – The Facts, and Nothing But the Facts”

Jim Durrett, executive director of the Buckhead Community Improvement District:

What began as an opportunity to improve the Peachtree corridor has devolved into a highly politicized referendum on cars versus bicycles.

Emails have been forwarded to me, written by people encouraging neighbors to oppose the Georgia Department of Transportation’s recommended alternative, that have been filled with misinformation, mistrust, fear and anger.

Many of those with whom I have spoken about the plan to restripe Peachtree have asked me to provide factual information about the proposal to compare with what they have been hearing from their neighbors. This post will do just that – give the reader good information upon which to base an opinion.

Peachtree, between Deering Road just north of Midtown Atlanta and Pharr Road in Buckhead, is an extremely inefficient road in terms of utilization of the available capacity and processing of traffic.

How does this inefficiency manifest itself?

Georgia DOT has monitored existing conditions and determined that there is only 15 percent use of the far left lane. Why is this? Because there are very few center left turn bays to allow people who wish to turn left off of Peachtree to get out of the far left lane so that others can continue straight ahead.

And there are very few traffic signals that give left-turning vehicles a green arrow. So most people avoid the far left lane because they don’t want to get stuck behind someone who wants to turn left, but has to wait for three lanes of oncoming traffic to clear.

Why is this a problem? Weaving is the biggest result, where cars are darting in and out of lanes to try to take advantage of a mostly empty far left lane or to get out of that lane to avoid a stopped car because someone is trying to turn left.

Because of this weaving, acceleration and deceleration, there have been many crashes – 801 in the past five years, according to Georgia DOT’s complete records. This is not a safe corridor. Nor is it a reliable corridor, in terms of being able to count on how long it should take you to get from one point to another.
Safety is Georgia DOT’s number one priority.

If you can improve safety by reducing crashes, not only does the public benefit from reduced damage to person and property, the public also benefits from decreased congestion due to crash incidents. Restriping Peachtree to provide a center left turn lane and left turn arrows on traffic signals where turning volumes warrant them is the best way to improve safety, as well as corridor reliability on Peachtree.
Other options?

OK, so why not widen Peachtree to add a center turn lane and be done with it? Because to do so would require severe property impacts, above ground and below ground utility relocations, and it would have environmental impacts that, combined, make this option a non-starter. So whatever will be done will have to take place between the existing curbs as they are today.

The predominant lane configuration that is on this stretch of Peachtree today is three 10-foot lanes in each direction – 60 feet from curb to curb. If 60 feet is what you have to work with, and you begin with the goal of having a center turn lane, you don’t have room to put back three lanes in each direction. The question now becomes what to put back on either side of the center turn lane.

Analysis:

As mentioned earlier, Georgia DOT monitored existing conditions, which included doing what is called traffic counts – how many cars travel in what direction during specific times of day and days of the week. They then looked at developments proposed and under construction along the corridor and just off of the corridor in Buckhead and estimated additional future traffic from those developments.

They then added additional future traffic from regional growth. They input all of these traffic data into a sophisticated computer traffic model in order to simulate traffic operations performance for different lane configurations.

Georgia DOT knows that up to 43,000 vehicles per day travel along the corridor. They know that there is also existing pedestrian, bicycle and MARTA transit activity in the corridor. They know that several churches have permission to park cars on Peachtree on Sundays.

They considered three southbound lanes and two northbound lanes to go with the center left turn lane. They considered two southbound lanes and three northbound lanes to go with the center left turn lane. They considered two southbound lanes and two northbound lanes with four-foot bike lanes next to the curb to go with the center left turn lane. They considered all of the above in different combinations for different segments between Deering and Pharr.

Georgia DOT modelled how traffic operations would perform under these various scenarios, in terms of travel time, delay at intersections and vehicle throughput (number of vehicles road could handle). They compared the results and weighed the relative benefits against their stated goals for the project: safety, traffic operations, and pedestrian and bicyclist safety and access (especially to the BeltLine, which will cross Peachtree north of Piedmont Hospital).

Georgia DOT’s preferred alternative is to provide the center left turn lane with dedicated left turn bays and green arrows for traffic signals where appropriate, to provide three southbound travel lanes and two northbound travel lanes between Peachtree Battle and Pharr Road, and to provide two southbound and two northbound travel lanes, along with four-foot bike lanes, between Deering Road and Peachtree Battle.

Conclusions:

What are the benefits of adopting this alternative?

Vehicle traffic operations performance is maintained in the corridor for the foreseeable future. In fact, Georgia DOT anticipates that the restriped road will be able to handle up to 10,000 more vehicles per day and that delays at intersections and travel times will improve for the corridor as a whole, especially in the afternoons.

Traffic flow will be better regulated than it is today. Crashes will be reduced (Georgia DOT expects a 20 percent reduction). Bicyclists will have dedicated and safer spaces with access to the future BeltLine. Where the bike lanes are present they provide an effective four-foot buffer between pedestrians and vehicles, and a reduced crossing distance for pedestrians.

I know it is counterintuitive that traffic operations will be improved by removing a lane or two, but when you consider 15 percent utilization of both inner lanes and the lack of a center turn lane as well as a reduction in crash incidents, it makes sense.

Did Georgia DOT consider that MARTA has the 110 bus that operates in this corridor? Yes.

Would motorists have to be careful not to hit a bicyclist in a bike lane when they need to turn right? Yes.

Will bike lanes make it safer for the bicyclist that uses Peachtree today? Yes.

Will traffic get so bad on Peachtree after the changes are made that neighborhoods will see increased cut-through traffic from cars escaping Peachtree? No.

The modeling indicates traffic improves on Peachtree, and it can handle more cars than it does today.

Anything else that I can think of writing is strictly my opinion. My goal was to better inform yours. I hope this helps.

Note to readers: If you want to share your thoughts about this topic, you may send your comments via email to the Georgia Department of Transportation through Monday, Nov. 9 at the following address: peachtreeproject@dot.ga.gov.

Good article. Opinions on the subject may differ but the facts do speak for themselves.

[CCATL]

Excellent summary. Puts all the naysayers in the other thread to bed with FACTS, rather than opinions. This is what we've been saying all along - number of lanes don't matter, it's how the road is designed that causes or reduces traffic. If adding bike lanes can go hand in hand with a safer and more efficient trip for cars, than that is a win win situation for all parties. Again, amazing to me that other posters continue to resist fact and think so surface level in these situations.

[cqholt]

All the naysayers have to do is look at the improved ADT of Ponce. I can see GDOT doing this similar project on Piedmont, between Lindbergh Dr and Peachtree.

[arjay57]

Originally Posted by CCATL

Excellent summary. Puts all the naysayers in the other thread to bed with FACTS, rather than opinions. This is what we've been saying all along - number of lanes don't matter, it's how the road is designed that causes or reduces traffic. If adding bike lanes can go hand in hand with a safer and more efficient trip for cars, than that is a win win situation for all parties. Again, amazing to me that other posters continue to resist fact and think so surface level in these situations.

I am okay with the millennials taking over as long as they leave us a little room to get out of our driveways so we can get to the doctor and run to the store to pick up some food.

[steveklein]

I love how Atlanta is starting to embrace cycling.

With as much traffic as there is in the metro area, it probably doesn't take much longer to travel by bike than it does by car on trips in the 5-8 mile range in busy areas of town. And the fact that it can double as exercise and is a net positive for the environment? Awesome.

[cqholt]

Originally Posted by arjay57

I am okay with the millennials taking over as long as they leave us a little room to get out of our driveways so we can get to the doctor and run to the store to pick up some food.

Won't need to, y'all can take MARTA or Uber so we don't have a bunch of elderly driving around, running us over on our bikes.

[ATLTJL]

Well, I don't know if these are necessarily facts....you'd have to take for granted that the models are accurate, and I don't really know how well a computer can simulate human behavior.

But that being beside the point, I'm curious to understand why 3 northbound lanes and only 2 southbound makes more sense than vice versa. Seems to me it would be a wash, with one being better at certain times of day and the other at another.

[cqholt]

Originally Posted by ATLTJL

Well, I don't know if these are necessarily facts....you'd have to take for granted that the models are accurate, and I don't really know how well a computer can simulate human behavior.

But that being beside the point, I'm curious to understand why 3 northbound lanes and only 2 southbound makes more sense than vice versa. Seems to me it would be a wash, with one being better at certain times of day and the other at another.

You have it backwards, 3 SB and 2 NB. My hypothesis as to this setup is to accommodate the Sunday church parking, as parking in a bike lane is illegal all the time.

[ATLTJL]

So you think that we are affecting traffic patterns to accommodate church parking?

Wow.

That would be pathetic.

But I bet you're right.

[cqholt]

Originally Posted by ATLTJL

So you think that we are affecting traffic patterns to accommodate church parking?

Wow.

That would be pathetic.

But I bet you're right.

I mean Jesus would have rode transit to service.