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  1. ACtrafficengr

    Is there any requirement for a project alignment to be at the center of ROW?

    How would he station this? Yes, there is apparently a major encroachment. My glass has a v/c ratio of 0.5 Maybe the tyranny of Murphy is the penalty for hubris. - http://xkcd.com/319/
  2. ACtrafficengr

    Potential Hire Claimed a PE license but verification showed it had lapsed

    This is getting into semantics, but the FAQ page of the New York State Office for the Professions says: So, in NY, he could say yes, he was a licensed engineer. You didn't ask if his registration was current. On the other hand, I wouldn't look favorably on that sort of rules-lawyering in a...
  3. ACtrafficengr

    Asphalt Pavement Reconstruction Options

    What is your AADT and truck percentage? We have had luck with cold-in-place recycling with a PCC admixture. The PCC halves the curing time and seems to improve strength. Then again, we have used it mostly on our rural collectors and local roads, not arterials. With FDR, you're going to have...
  4. ACtrafficengr

    Does IBC cover fences?

    Thanks for the feedback, everyone. Just for context, this is in a county-owned historic site. It's on a filled arch bridge over an 19th century spillway, in a former Shaker settlement. Someone suggested a split rail fence with steel mesh or chain link attached to the back, but I don't know if...
  5. ACtrafficengr

    Does IBC cover fences?

    I've been asked about fall protection fencing for a bridge over a dam spillway. It's on a filled masonry arch, so posts will be driven into the4 ground. It's in a historic area, so aesthetics are a concern. I'm used to highway design standards, which don't really apply here. As I understand...
  6. ACtrafficengr

    ????? Degrees/Percentage of a road (traffic signals)

    Grade is rise/run*100. A 100% grade means you rise one unit of measure (meters, foot, barleycorn, etc.) for every unit you move forward. So a 100% grade is a 45 degree angle. My glass has a v/c ratio of 0.5 Maybe the tyranny of Murphy is the penalty for hubris. - http://xkcd.com/319/
  7. ACtrafficengr

    Pedestrian connectivity during construction

    It depends on the laws where you are. In the US, a pedestrian facility open to the public has to meet minimum standards for accessibility for all people with mobility or vision problems, unless they can prove it isn't "technically feasible." My glass has a v/c ratio of 0.5 Maybe the tyranny...
  8. ACtrafficengr

    jersey barrier with integrated chain link fence

    That fence is likely to become a projectile if a truck hits the barrier. My glass has a v/c ratio of 0.5 Maybe the tyranny of Murphy is the penalty for hubris. - http://xkcd.com/319/
  9. ACtrafficengr

    LIGHT POLE ON HANDRAIL on ONE SIDE ONLY

    Are the light poles doubling as rail supports? US ADA handrail loading, iirc, is whichever produces the larger reaction: 50lb/LF or a 200lb point load. I'm not as familiar with loading on poles. My glass has a v/c ratio of 0.5 Maybe the tyranny of Murphy is the penalty for hubris. -...
  10. ACtrafficengr

    THIS MASSIVE SOLAR FARM, ONE OF THE LARGEST PROJECTS IN DOD HISTORY

    The idea of "Agrovoltaics" is getting some banter. A project near me is proposing using the land around the panels for sheep pasture. There is also talk of growing shade-liking crops under the panels. My glass has a v/c ratio of 0.5 Maybe the tyranny of Murphy is the penalty for hubris. -...
  11. ACtrafficengr

    Construction to Design

    I started my career doing traffic engineering support for the design and construction groups for a state DOT. My favorite designers were those that had worked in the operations side of the department, especially construction or maintenance. They were better at generating designs that could be...
  12. ACtrafficengr

    How much weight will this carry now?

    In the second and last photos, is that column out of plumb? Maybe OP should hire an engineer to replace the bridge with a large culvert. My glass has a v/c ratio of 0.5 Maybe the tyranny of Murphy is the penalty for hubris. - http://xkcd.com/319/
  13. ACtrafficengr

    Earth radiates heat to what?

    I had a hard time explaining to a banker friend how frost can form when it's 33F. Her car was stuck in some mud, and she thought she needed to wait until the air dropped below freezing for the mud to stiffen up. I told her to try it, it might work. It did, and she was quite confused. She...
  14. ACtrafficengr

    A parent's question re: ChemE & CompSci

    If this is the wrong spot for this question, just say so and I'll move it. I asked my 16-year old yesterday about what he would like to study in college, and he said chemistry or comp sci. I asked if he had a preference between chemistry as a science or chemical engineering. He apparently...
  15. ACtrafficengr

    Minimum curve radius along the road

    There are too many possible combinations of speed, radius, banking, profile, pavement friction values, etc. for that to bee a useful approach. For a tractor trailer, rollover thresholds are much lower than cars. The worst cases are top-heavy loads and partly loaded tankers with sloshing...
  16. ACtrafficengr

    Question on sealing report.

    One local consultant uses the term "construction inspector." They always lose points on our RFP evaluations because of it. Security monitor My glass has a v/c ratio of 0.5 Maybe the tyranny of Murphy is the penalty for hubris. - http://xkcd.com/319/
  17. ACtrafficengr

    Hydraulic Area - Converting a box culvert to a series of circular culverts

    You can download HY-8 software for simple culvert analysis from the US FHWA website. From your username, I'm assuming USGS StreamStats won't help with flow rates. Does Canada have something similar? The main issues we have with multibarrel culverts are compaction between the pipes, and...
  18. ACtrafficengr

    Estimated storage requirement for UK Grid

    The other way to look at it is this: given all the other stuff we make from petroleum, why are we burning it? My glass has a v/c ratio of 0.5 Maybe the tyranny of Murphy is the penalty for hubris. - http://xkcd.com/319/
  19. ACtrafficengr

    Estimated storage requirement for UK Grid

    For grid scale storage, lithium battery chemistries are not the best option. Since scalability becomes more important than power density, redox flow batteries can be used, and they are much less flammable. My glass has a v/c ratio of 0.5 Maybe the tyranny of Murphy is the penalty for hubris...
  20. ACtrafficengr

    Handrail requirements at edge of sidewalk near slope

    Based on the drawing, the ADA regs would consider that a ramp, not a sidewalk. If the rise is over 6", a ramp is required. If the ramp is older than the ADA regs, I think it's grandfathered until the ramp is rebuilt or altered. I'm not sure if removing the junipers would count as an...

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