Petru S. 🚄🚦🚲
@sofio.bsky.social
He/Him | NU 2028 (civil engineering) | *Posts/Likes/Etc. reflect my own views*
I love my new job !
January 16, 2026 at 10:25 PM
I love my new job !
What a gorgeous signal.
January 15, 2026 at 1:17 AM
What a gorgeous signal.
Reposted by Petru S. 🚄🚦🚲
Actual causes of the US road safety crisis:
🔹 Car bloat
🔹 Failure to enforce traffic laws
🔹 Fast urban roads
🔹 Suburbanization of poverty/jobs
Blaming smartphones is lazy thinking.
🔹 Car bloat
🔹 Failure to enforce traffic laws
🔹 Fast urban roads
🔹 Suburbanization of poverty/jobs
Blaming smartphones is lazy thinking.
US Traffic Safety Is Getting Worse, While Other Countries Improve
The rising rate of road deaths in the US continues to defy global trends. Here’s what traffic planners in other nations could teach their American counterparts.
www.bloomberg.com
January 11, 2026 at 2:49 PM
Actual causes of the US road safety crisis:
🔹 Car bloat
🔹 Failure to enforce traffic laws
🔹 Fast urban roads
🔹 Suburbanization of poverty/jobs
Blaming smartphones is lazy thinking.
🔹 Car bloat
🔹 Failure to enforce traffic laws
🔹 Fast urban roads
🔹 Suburbanization of poverty/jobs
Blaming smartphones is lazy thinking.
Reposted by Petru S. 🚄🚦🚲
Come! Talk with me and other staff about this project on Wednesday evening!
The Broadway Safety Improvement Project design feedback survey is now open.
Learn more about the proposed design for Section C near the high school and main library, or join us at the Open House on January 7, 6–8 PM at the High School.
More info: https://camb.ma/4lXptsf.
Learn more about the proposed design for Section C near the high school and main library, or join us at the Open House on January 7, 6–8 PM at the High School.
More info: https://camb.ma/4lXptsf.
January 5, 2026 at 6:37 PM
Come! Talk with me and other staff about this project on Wednesday evening!
Arlington is really working to reduce speeding on Lake street.
✅ Speed limit is now 25 instead of 30
✅ 25 MPH reminder signs installed
✅ Signal at Minuteman now has pedestrian recall for the trail so the signal gives vehicles red more often (and provides less delay for trail users)
✅ Speed limit is now 25 instead of 30
✅ 25 MPH reminder signs installed
✅ Signal at Minuteman now has pedestrian recall for the trail so the signal gives vehicles red more often (and provides less delay for trail users)
January 4, 2026 at 2:42 AM
Arlington is really working to reduce speeding on Lake street.
✅ Speed limit is now 25 instead of 30
✅ 25 MPH reminder signs installed
✅ Signal at Minuteman now has pedestrian recall for the trail so the signal gives vehicles red more often (and provides less delay for trail users)
✅ Speed limit is now 25 instead of 30
✅ 25 MPH reminder signs installed
✅ Signal at Minuteman now has pedestrian recall for the trail so the signal gives vehicles red more often (and provides less delay for trail users)
Loving Arlington’s newest RRFB crosswalks that come with this white light that illuminates the crosswalk and pedestrian when the button is pressed. Makes the crossing so much more visible!
January 3, 2026 at 9:00 PM
Loving Arlington’s newest RRFB crosswalks that come with this white light that illuminates the crosswalk and pedestrian when the button is pressed. Makes the crossing so much more visible!
Witnessing a funny phenomenon on Hammond Pond Parkway today.
I saw more or the same level of drivers wait at this red arrow without a No Turn on Red sign as I did see wait for the no turn on red sign.
There’s something psychological about a red arrow that is stronger than a sign.
I saw more or the same level of drivers wait at this red arrow without a No Turn on Red sign as I did see wait for the no turn on red sign.
There’s something psychological about a red arrow that is stronger than a sign.
January 3, 2026 at 2:00 AM
Witnessing a funny phenomenon on Hammond Pond Parkway today.
I saw more or the same level of drivers wait at this red arrow without a No Turn on Red sign as I did see wait for the no turn on red sign.
There’s something psychological about a red arrow that is stronger than a sign.
I saw more or the same level of drivers wait at this red arrow without a No Turn on Red sign as I did see wait for the no turn on red sign.
There’s something psychological about a red arrow that is stronger than a sign.
Reposted by Petru S. 🚄🚦🚲
Cars are now being programmed to violate traffic rules. What could go wrong?
Me, in @fastcompany.com. (no paywall)
🧵
Me, in @fastcompany.com. (no paywall)
🧵
Tesla’s ‘Mad Max mode’ points to a big problem for self-driving cars
Mad Max mode exposes a risk for AV innovation. To stay competitive, computer-powered cars are emulating human drivers.
www.fastcompany.com
December 19, 2025 at 1:18 PM
Cars are now being programmed to violate traffic rules. What could go wrong?
Me, in @fastcompany.com. (no paywall)
🧵
Me, in @fastcompany.com. (no paywall)
🧵
On foggy mornings like today, I’m reminded of America’s lack of a rear fog light requirement. Cars in America are simply less safe than in Europe.
It’s time we require cars to have rear fog lights for conditions like these. Makes no sense that only European cars require these safety features.
December 29, 2025 at 2:09 PM
On foggy mornings like today, I’m reminded of America’s lack of a rear fog light requirement. Cars in America are simply less safe than in Europe.
Reposted by Petru S. 🚄🚦🚲
SUVs and big Utes "are 44 per cent more likely to kill an adult pedestrian or cyclist in a crash compared with a sedan, and 82 per cent more likely to kill a child" www.theage.com.au/national/vic...
Pedestrian fatalities reach 17-year-high. This trend could be why
Fifty-one pedestrians had been killed on the state’s roads this year as of Saturday – the most in any calendar year since 2008.
www.theage.com.au
December 27, 2025 at 9:30 PM
SUVs and big Utes "are 44 per cent more likely to kill an adult pedestrian or cyclist in a crash compared with a sedan, and 82 per cent more likely to kill a child" www.theage.com.au/national/vic...
Can anyone read this?
Cc @massdot.bsky.social please replace the no turn on red sign at concord turnpike and park ave in Arlington!
Cc @massdot.bsky.social please replace the no turn on red sign at concord turnpike and park ave in Arlington!
December 20, 2025 at 8:35 PM
Can anyone read this?
Cc @massdot.bsky.social please replace the no turn on red sign at concord turnpike and park ave in Arlington!
Cc @massdot.bsky.social please replace the no turn on red sign at concord turnpike and park ave in Arlington!
Arlington’s first “raised crossing”. It happened by accident while installing new curb cuts, but it’s a happy one IMO! Excited to see more in the future with Mass and Appleton and others coming soon.
December 19, 2025 at 9:11 PM
Arlington’s first “raised crossing”. It happened by accident while installing new curb cuts, but it’s a happy one IMO! Excited to see more in the future with Mass and Appleton and others coming soon.
Reposted by Petru S. 🚄🚦🚲
NEW: Incoming Mayor Zohran Mamdani will appeal a Queens judge's ruling ordering the city to rip out the new protected bike lane on 31st Street in Astoria. nyc.streetsblog.org/2025/12/17/m...
Mamdani Vows To Appeal Ruling that Killed DOT's Astoria Bike Lane - Streetsblog New York City
The city has yet to appeal the nearly two-week-old ruling — but a new mayor says he'll change that pronto.
nyc.streetsblog.org
December 17, 2025 at 6:44 PM
NEW: Incoming Mayor Zohran Mamdani will appeal a Queens judge's ruling ordering the city to rip out the new protected bike lane on 31st Street in Astoria. nyc.streetsblog.org/2025/12/17/m...
Some new signals in Portsmouth. Glad they kept the no turn on red restrictions but that signage placement is not ideal.
December 16, 2025 at 10:29 PM
Some new signals in Portsmouth. Glad they kept the no turn on red restrictions but that signage placement is not ideal.
Parking garage separated bike lane in Fenway
December 16, 2025 at 3:17 AM
Parking garage separated bike lane in Fenway
4 trains worth of orange line folks have arrived since I’ve been waiting for the red line at DTX. Now the train will certainly be over capacity.
No you’re so right. Waiting at downtown crossing now our train has been 2 minutes away for 7 minutes and now the station is packed
December 15, 2025 at 2:39 PM
4 trains worth of orange line folks have arrived since I’ve been waiting for the red line at DTX. Now the train will certainly be over capacity.
Studying for finals now and thinking about my time in the Netherlands. Was so lovely to cycle there. Here are some photos from Amsterdam in July. Love to see high quality built-out infrastructure, can’t wait to build more of it in the US!
December 12, 2025 at 2:13 AM
Studying for finals now and thinking about my time in the Netherlands. Was so lovely to cycle there. Here are some photos from Amsterdam in July. Love to see high quality built-out infrastructure, can’t wait to build more of it in the US!
Lexington painted and extended their bike lane mass ave bike lane green! Green bike lane paint costs about 12 dollars a square foot sooo,, definitely a lot of money. But hey, good safety for intersections.
Also added new blank out No Turn on Red, though the timing isn’t perfect on them.
Also added new blank out No Turn on Red, though the timing isn’t perfect on them.
November 30, 2025 at 4:15 AM
Lexington painted and extended their bike lane mass ave bike lane green! Green bike lane paint costs about 12 dollars a square foot sooo,, definitely a lot of money. But hey, good safety for intersections.
Also added new blank out No Turn on Red, though the timing isn’t perfect on them.
Also added new blank out No Turn on Red, though the timing isn’t perfect on them.
Reposted by Petru S. 🚄🚦🚲
The difference in the time it takes a streetcar in Amsterdam vs. Toronto to clear an intersection after servicing a nearside stop.
October 30, 2025 at 1:32 AM
The difference in the time it takes a streetcar in Amsterdam vs. Toronto to clear an intersection after servicing a nearside stop.
Grateful for @massdcr.bsky.social converting this signal at Matignon from a pedestrian signal to a full one featuring a blank out sign (that activates before the pedestrian phase !). Much safer intersection now!
November 9, 2025 at 5:12 PM
Grateful for @massdcr.bsky.social converting this signal at Matignon from a pedestrian signal to a full one featuring a blank out sign (that activates before the pedestrian phase !). Much safer intersection now!
Reposted by Petru S. 🚄🚦🚲
Good God. Someone stop them. NOW. arstechnica.com/cars/2025/10...
#RoadSafety #SafetyOverSpeed #VisionZero #transportation #CarCulture #CrashNotAccident #KillerTeslas
#RoadSafety #SafetyOverSpeed #VisionZero #transportation #CarCulture #CrashNotAccident #KillerTeslas
Tesla’s “Mad Max” mode is now under federal scrutiny
The new mode added in the latest update will speed and weave through traffic.
arstechnica.com
October 31, 2025 at 3:33 PM
Good God. Someone stop them. NOW. arstechnica.com/cars/2025/10...
#RoadSafety #SafetyOverSpeed #VisionZero #transportation #CarCulture #CrashNotAccident #KillerTeslas
#RoadSafety #SafetyOverSpeed #VisionZero #transportation #CarCulture #CrashNotAccident #KillerTeslas
Shout out bus lanes!
October 29, 2025 at 9:51 PM
Shout out bus lanes!
Review is in: Aberdeen’s new separated lane is amazing! Love being so close to the trees in the center of the roadway, and the transitions are well designed with minimal waiting.
October 6, 2025 at 12:32 AM
Review is in: Aberdeen’s new separated lane is amazing! Love being so close to the trees in the center of the roadway, and the transitions are well designed with minimal waiting.
This is some wicked clever stuff from BTD. Looking forward to seeing these tactics used in the field soon! Seems like such a win for the region. www.boston.gov/departments/...
Better Buffers
We’re switching out materials to enhance safety for all travelers.
www.boston.gov
September 29, 2025 at 11:24 PM
This is some wicked clever stuff from BTD. Looking forward to seeing these tactics used in the field soon! Seems like such a win for the region. www.boston.gov/departments/...