Boulder Opa Fiets
@boulderopafiets.bsky.social
Cycling, bike touring, skate skiing, grandkids, dogs, urbanism.
Semi-Retired???
Semi-Retired???
Reposted by Boulder Opa Fiets
Dr. Gladys West, the pioneering mathematician whose work laid the foundation for modern GPS technology, has died. She was 95.
Dr. Gladys West, Mathematician Whose Work Made GPS Possible, Dies at 95
ALEXANDRIA, VA — Dr. Gladys West, the pioneering mathematician whose work laid the foundation for modern GPS technology, has died. She passed away
thezebra.org
January 19, 2026 at 6:00 PM
Dr. Gladys West, the pioneering mathematician whose work laid the foundation for modern GPS technology, has died. She was 95.
Reposted by Boulder Opa Fiets
Might do an entire series of Nazi photos side-by-side with contemporary ICE and CBP arrests
January 19, 2026 at 4:00 AM
Might do an entire series of Nazi photos side-by-side with contemporary ICE and CBP arrests
Reposted by Boulder Opa Fiets
A heck of a chart: in every single one of the 10 major US cities that built the most housing between 2017 and 2023, rents for older, existing units fell—often by quite a bit.
January 6, 2026 at 5:18 PM
A heck of a chart: in every single one of the 10 major US cities that built the most housing between 2017 and 2023, rents for older, existing units fell—often by quite a bit.
Reposted by Boulder Opa Fiets
NEW: Mandatory evacuation order for the South Pointe neighborhood in Boulder County. Wildfire at 287 and Dillion (SE of Louisville)
January 5, 2026 at 10:34 PM
NEW: Mandatory evacuation order for the South Pointe neighborhood in Boulder County. Wildfire at 287 and Dillion (SE of Louisville)
January 3, 2026 at 2:28 AM
Reposted by Boulder Opa Fiets
15 Minute Neighborhoods =
No Car Needed!
Kids have our one car, taking grandkids skiing.
Biked to the a rec center.
Walked the dog to McGuckins.
Biked to in-laws for dinner with Bella in tow.
#Boulder #WarOnCars #BikeEveryWhere
No Car Needed!
Kids have our one car, taking grandkids skiing.
Biked to the a rec center.
Walked the dog to McGuckins.
Biked to in-laws for dinner with Bella in tow.
#Boulder #WarOnCars #BikeEveryWhere
December 27, 2025 at 4:40 AM
15 Minute Neighborhoods =
No Car Needed!
Kids have our one car, taking grandkids skiing.
Biked to the a rec center.
Walked the dog to McGuckins.
Biked to in-laws for dinner with Bella in tow.
#Boulder #WarOnCars #BikeEveryWhere
No Car Needed!
Kids have our one car, taking grandkids skiing.
Biked to the a rec center.
Walked the dog to McGuckins.
Biked to in-laws for dinner with Bella in tow.
#Boulder #WarOnCars #BikeEveryWhere
Reposted by Boulder Opa Fiets
Bella, Our 13 year old has warmed up To the grandkids. Lots of treats w were involved.
December 25, 2025 at 4:02 AM
Bella, Our 13 year old has warmed up To the grandkids. Lots of treats w were involved.
Reposted by Boulder Opa Fiets
Year 1 data on congestion pricing in Manhattan…
* Vehicle traffic: -11%
* Foot traffic: +3.4%
* Storefront vacancy: -0.9%
* Pollution: -22%
* Revenue for mass transit: $548M
So YES this has been a huge success.
* Vehicle traffic: -11%
* Foot traffic: +3.4%
* Storefront vacancy: -0.9%
* Pollution: -22%
* Revenue for mass transit: $548M
So YES this has been a huge success.
December 23, 2025 at 2:00 PM
Year 1 data on congestion pricing in Manhattan…
* Vehicle traffic: -11%
* Foot traffic: +3.4%
* Storefront vacancy: -0.9%
* Pollution: -22%
* Revenue for mass transit: $548M
So YES this has been a huge success.
* Vehicle traffic: -11%
* Foot traffic: +3.4%
* Storefront vacancy: -0.9%
* Pollution: -22%
* Revenue for mass transit: $548M
So YES this has been a huge success.
December 16, 2025 at 5:28 AM
December 16, 2025 at 5:11 AM
Reposted by Boulder Opa Fiets
One of the many reasons change is hard when it comes to better cities is that the ability to picture your city being and working very differently than it does now, aka “having vision,” is not nearly as common as we think. And it’s sadly not a prerequisite for leadership, although it should be.
November 30, 2025 at 8:28 PM
One of the many reasons change is hard when it comes to better cities is that the ability to picture your city being and working very differently than it does now, aka “having vision,” is not nearly as common as we think. And it’s sadly not a prerequisite for leadership, although it should be.
Reposted by Boulder Opa Fiets
He seems to be constantly fighting 'wokeness' these days...
December 2, 2025 at 7:06 PM
He seems to be constantly fighting 'wokeness' these days...
On the Big Blue Bus to see Mi Nieta y Mi Nieto in Santa Monica.
$1.25 from LAX. Might be less as I bought a 10 pack of rides a few years ago.
$1.25 from LAX. Might be less as I bought a 10 pack of rides a few years ago.
November 25, 2025 at 9:18 PM
On the Big Blue Bus to see Mi Nieta y Mi Nieto in Santa Monica.
$1.25 from LAX. Might be less as I bought a 10 pack of rides a few years ago.
$1.25 from LAX. Might be less as I bought a 10 pack of rides a few years ago.
Reposted by Boulder Opa Fiets
We want to speak directly to members of the Military and the Intelligence Community.
The American people need you to stand up for our laws and our Constitution.
Don’t give up the ship.
The American people need you to stand up for our laws and our Constitution.
Don’t give up the ship.
November 18, 2025 at 1:31 PM
We want to speak directly to members of the Military and the Intelligence Community.
The American people need you to stand up for our laws and our Constitution.
Don’t give up the ship.
The American people need you to stand up for our laws and our Constitution.
Don’t give up the ship.
Reposted by Boulder Opa Fiets
Reposted by Boulder Opa Fiets
Pedal Power Remains Most Efficient Way To Travel, Confirms Scientific American www.forbes.com/sites/carlto...
Pedal Power Remains Most Efficient Way To Travel, Confirms Scientific American
Scientific American confirms that human on a bicycle more efficient than salmon, seagulls, or jet planes, updating a piece from 1973.
www.forbes.com
October 17, 2025 at 12:23 PM
Pedal Power Remains Most Efficient Way To Travel, Confirms Scientific American www.forbes.com/sites/carlto...
Reposted by Boulder Opa Fiets
This two-parter below is exactly why it's hard to make clothes in the United States.
Let's look at how much it costs to produce a button-up shirt in the US. 🧵
Let's look at how much it costs to produce a button-up shirt in the US. 🧵
October 12, 2025 at 9:38 PM
This two-parter below is exactly why it's hard to make clothes in the United States.
Let's look at how much it costs to produce a button-up shirt in the US. 🧵
Let's look at how much it costs to produce a button-up shirt in the US. 🧵
Reposted by Boulder Opa Fiets
It’s pronounced cyclist.
October 11, 2025 at 10:21 PM
It’s pronounced cyclist.
Reposted by Boulder Opa Fiets
All current WSJ headlines
October 8, 2025 at 8:56 PM
All current WSJ headlines
Reposted by Boulder Opa Fiets
Speed safety cameras are astonishingly successful. We know the tools that reduce traffic violence. Legalize them.
www.sfmta.com/blog/our-spe...
www.sfmta.com/blog/our-spe...
October 8, 2025 at 12:37 AM
Speed safety cameras are astonishingly successful. We know the tools that reduce traffic violence. Legalize them.
www.sfmta.com/blog/our-spe...
www.sfmta.com/blog/our-spe...
Reposted by Boulder Opa Fiets
I feel like this photo of masked, armed men pepper spraying a pastor protecting his community is going to be a defining picture of this moment in America for a long, long time.
October 7, 2025 at 11:29 PM
I feel like this photo of masked, armed men pepper spraying a pastor protecting his community is going to be a defining picture of this moment in America for a long, long time.