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I don't think that's quite right. People in Dundalk will suffer a fair bit, as will folks in Glen Burnie and Annapolis, but most people are going from DC to Del

I don't think that's quite right. People in Dundalk will suffer a fair bit, as will folks in Glen Burnie and Annapolis, but most people are going from DC to Delaware, and go north rather than over the Key bridge. I think this is most harmful for commuters. Blocking the Baltimore harbor is brutal although I suspect the passage will be cleared as quickly as possible.

dgfitz 3y ago
I think 30-35k cars a day cross that bridge. Being local to the area, is is going to make traffic in the entire metro area much worse, and it is already awful.
- desro 3y ago
  Report from CBS News mentions the bridge handled "11.5 million" vehicles a day. EDIT: That number seemed fishy; I think the reporter is referring to the traffic along the entire I-95 corridor. https://x.com/CBSNews/status/1772556368106450953?s=20 https://x.com/CBSNews/status/1772556368106450953?s=20
  - senordevnyc 3y ago
    [dead]
  - dgfitz 3y ago
    It is between 30-35k/day, about 12.5 million/yr.
  - CydeWeys 3y ago
    LOL, that figure is clearly off. That's double the population of the entire state! Per another comment it's much closer to correct for the annual number of vehicle crossings.
  - dredmorbius 3y ago
    One way to assess these numbers is to conduct a quick sanity check. How many cars per minute or second would this be? 11.5 million cars/day is equivalent to : ~48,000 cars/hour ~8,000 cars/minute ~130 cars/second Clearly, somethings ... a tad off. 11.5 million cars per year however works out to: 31,000 cars/day 1,300 cars/hour 21 cars/minute Or roughly a 3 second headway per vehicle. Given four traffic lanes (two in each direction), that would be a vehicle every twelve seconds per lane, which seems far more reasonable. That's spread out over the day, so peak-hour traffic would be much higher. Peak capacity for a highway lane is just shy 2,000 vehicles/hour: <https://www.mikeontraffic.com/numbers-every-traffic-engineer-should-know/ https://www.mikeontraffic.com/numbers-every-traffic-engineer...> Which would put the Key Bridge's maximum capacity at about 192,000 vehicles/day. For comparison, the San Francisco-Oakland Bay Bridge saw about 42.7 million paid toll crossings. As these are metered only in the westbound direction, actual crossings are likely double that, or 85.4 million/year, or about 230,000/day. (The bridge sees 1/3 the total traffic of all California state-owned bridges.) <https://mtc.ca.gov/operations/programs-projects/bridges/san-francisco-oakland-bay-bridge https://mtc.ca.gov/operations/programs-projects/bridges/san-...>

dgfitz 3y ago

I think 30-35k cars a day cross that bridge. Being local to the area, is is going to make traffic in the entire metro area much worse, and it is already awful.

desro 3y ago
Report from CBS News mentions the bridge handled "11.5 million" vehicles a day. EDIT: That number seemed fishy; I think the reporter is referring to the traffic along the entire I-95 corridor. https://x.com/CBSNews/status/1772556368106450953?s=20 https://x.com/CBSNews/status/1772556368106450953?s=20
- senordevnyc 3y ago
  [dead]
- dgfitz 3y ago
  It is between 30-35k/day, about 12.5 million/yr.
- CydeWeys 3y ago
  LOL, that figure is clearly off. That's double the population of the entire state! Per another comment it's much closer to correct for the annual number of vehicle crossings.
- dredmorbius 3y ago
  One way to assess these numbers is to conduct a quick sanity check. How many cars per minute or second would this be? 11.5 million cars/day is equivalent to : ~48,000 cars/hour ~8,000 cars/minute ~130 cars/second Clearly, somethings ... a tad off. 11.5 million cars per year however works out to: 31,000 cars/day 1,300 cars/hour 21 cars/minute Or roughly a 3 second headway per vehicle. Given four traffic lanes (two in each direction), that would be a vehicle every twelve seconds per lane, which seems far more reasonable. That's spread out over the day, so peak-hour traffic would be much higher. Peak capacity for a highway lane is just shy 2,000 vehicles/hour: <https://www.mikeontraffic.com/numbers-every-traffic-engineer-should-know/ https://www.mikeontraffic.com/numbers-every-traffic-engineer...> Which would put the Key Bridge's maximum capacity at about 192,000 vehicles/day. For comparison, the San Francisco-Oakland Bay Bridge saw about 42.7 million paid toll crossings. As these are metered only in the westbound direction, actual crossings are likely double that, or 85.4 million/year, or about 230,000/day. (The bridge sees 1/3 the total traffic of all California state-owned bridges.) <https://mtc.ca.gov/operations/programs-projects/bridges/san-francisco-oakland-bay-bridge https://mtc.ca.gov/operations/programs-projects/bridges/san-...>