Friday, December 18, 2009
Just move the car already.
Thursday, December 17, 2009
Tailgaters
I'm not saying that I miss my Dad's old '65 GMC pickup when I had a tailgater. That thing was like a friggin' tank and it would be no problem to remind tailgaters that their proffered method of following me wasn't the best way. No, no...to say that would be irresponsible and incredibly foolish.
About a year ago, my department issued the motors lidars with the DBC (Distance Between Cars) function. The DBC works by shooting both vehicles either as they approach (front bumpers) or as they pass (rear bumpers). The lidar calculates the speed of both vehicles, distances from the operator's location, the distance between the cars (in both time and feet), and the time between both shots.
Human perception/reaction time has long been understood to be 1.5 seconds. Folks that are way smarter than me and probably have more initials behind their names and degrees on their walls conducted enough experiments, studies, and scientific type stuff to determine that time. What does that mean in layman's terms? It takes .75 seconds for your average human to perceive, in this example, what the driver ahead of you is doing, and an additional .75 seconds to safely react to it. That totals 1.5 seconds from start to finish.
Consequently, when I shoot two vehicles with the DBC function and I get a digital readout with the time between the two cars. That is to say, it calculates how quickly one car will pass the same point the car in front of it just passed. I feel perfectly justified in stopping and citing anything less than one second. More often than not, though, I give an additional benefit of the doubt of another .1 second. Generous, no?
Here's the part where the judge in my jurisdiction seems to get stuck on. Let's say the speed limit is 45 mph. I see two cars and the second is too close to the first. I shoot both cars and get a display of .88 seconds and a distance of 53'. The second vehicle is not violating the basic speed law at 43 mph. Or is he? CVC 22350 requires drivers to "have due regard for the traffic upon the highway". If the vehicle in front of the tailgater is too close for safety, doesn't that violate 22350? Maybe, but CVC 21703 is more specific with regard to tailgating, "The driver of a motor vehicle shall not follow another vehicle more closely than is reasonable and prudent, having due regard for the speed of such vehicle and the traffic upon, and the condition of, the roadway."
It seems because the speed and distance in the aforementioned example is what it is, the judge takes exception to the rule. Allow me to explain further...
43 mph correlates to about 63 fps (feet per second). In 1.5 seconds, the vehicle will travel about 94.5 feet. If the distance between the cars is 53', it is nearly physiologically impossible for a human to avoid a collision if the driver in front aggressively brakes for any reason at that speed.
It's an anomaly for the judge to take exception to tailgating. I've testified to 21703 a couple dozen times and I've written quite a few that never went to trial. In my opinion, it's a fantastic cite and helps reduce collisions if people are more aware of how close they are traveling behind the car in front of them. So many of our rear-end collisions cite speeding as the primary collision factor when in fact tailgating is more likely the culprit. Unfortunately, witnesses are scarce and speeding is easier to prove than tailgating without corroboration from a witness or involved party.
I'll keep writing them. If the judge sees fit to dismiss the occasional violation, it's no skin of my nose. As far as I'm concerned, I'm making the streets safer by writing this particular violation. So many people simply don't realize how close they actually are to the car in front of them. And it's awful damn hard to argue with the lidar.
Wednesday, December 16, 2009
Testifying and You
Tuesday, December 15, 2009
I don't get it
Either dispatch or an officer is putting out the description of a vehicle. The vehicle is described as a late model Honda four door and it's "red in color". Really? In color? What the hell else would it be? Red in shape? Red in texture?
It's not a big deal. It's just one of those things that bugs me. Like asking for the next available report number. What else is dispatch going to give you? The report number for next week? Stop being redundant. You're taking up airtime.
We now return you to your regularly scheduled blog reading. Thank you.
Monday, December 14, 2009
Ask MC
Is it legal to ride a bicycle with earbuds in in California ? When I learned to ride a bike, I recall an officer coming into my second-grade class to inform us all it was illegal to ride our bikes while listening to our walkmans. Now I live and work in an university town which prides itself on being ‘bike friendly,’ but I would rather walk than ride a bike here, just because so many of the residents, especially the students, ride their bikes while listening to ipods and other devices. And unlike the long-dated walkman headphones, I can’t see the earbuds when I come up behind someone. These people can not hear me when I call out “Passing on your right!” or “Look out!” They can’t hear traffic and I’ve seen some related careless behavior which scares the socks off me. Many of these folks have no idea how to ride a bike in the first place, they don’t seem to know they count as vehicular traffic, but their inability to hear just adds an additional layer of scary to it all.
Thank you for your time and attention.
Sincerely,
Marguerite
Thursday, December 10, 2009
Time Constraints
I am aware I've been slacking (thank you, Chachi), but barely a day goes by that I don't think about my self-inflicted writing responsibilities. I hope you all had a lovely Thanksgiving (for us American types...sorry, England) and your Christmases are equally lovely.
Now, if you'll excuse me, Daddy duty calls...
Tuesday, December 1, 2009
Weekly Question
Ann offers the following scenario:
This has been bothering me for a while, maybe you can weigh in…
A while back a very inebriated man stumbled into my workplace (not the first time this had happened with the same individual). I had seen him drive to my office in his car, and knew full well he would be getting back in the same car and heading back out on the streets of Seattle.
While my coworker “entertained” him, I went into the other room to let the police know about the impending deadly weapon headed for the streets, and his past history which all but guaranteed I wasn’t being overly cautious.
I was told that they couldn’t do anything until he was actually headed for his car, and told to call back at that time. No surprise, by the time I reached the police he was in his car and on his merry way down the street. I have no idea if he killed anybody after he left me.
Apparently, one needs to actually view the bullet leaving the barrel of the gun before calling the police. It’s ok to point the gun, but until you actually pull the trigger, no crime has been committed.
What else can a person do in this situation (keeping in mind, said person is a smallish female, and in no position to be trying to tackle a drunk)?
Excellent question, Ann. I can't answer for the Seattle PD (who did one hell of a job today...see this). The laws may very well be different in Washington. As per usual, all I can offer is how I would handle the incident.
Based on what you've said, it seems you saw the individual driving. If I were dispatched to you and I saw an inebriated individual that was identified by an independent witness (you) as the driver of a vehicle, I would then be able to pursue a DUI investigation. For the sake of argument, let's assume you didn't see him driving. His level of inebriation and his ability to care for himself (or lack thereof) may qualify as being drunk in public. It's a lesser charge and I don't need any witnesses.
Obviously, your situation didn't work out that way. Should there be a next time, my only advice is to get as detailed a description of the individual, vehicle (to include the license plate), and last known direction of travel as you can and pass it along to the police. We get these kinds of calls from time to time and, if possible, we can sit on the registered owner's home in the hopes that the driver is the registered owner and the individual is actually headed home. If we see the driver commit any infraction, we can stop the vehicle. If not, we can still consensually contact the driver when they pull up to the house and try to ascertain if there actually is a crime occurring.
It's a tough spot for you to be in, 5'2" or not. In this case, I would certainly not advise you to attempt to detain anyone, particularly if they are indeed intoxicated. Drunk folks tend to not think rationally.
Thanks for the question and I hope my answer helped!