Home arrow Forums



Go Back   XS11.com Forums > Riding > Riding Tips

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 08-24-2008, 01:34 PM
TopCatGr58's Avatar
TopCatGr58 TopCatGr58 is offline
Administrator
 
Join Date: Jul 2002
Location: Portsmouth, Va.
Posts: 12,621
Exclamation Yes, You/We ARE Invisible!! Part1

Hey there Xsives,

I've been planning this post/tech tip for some time, but in lieu of recent posts about riders going down/getting turned in front of, etc., seems like a timely opportunity for it! There is a lot of data that is being presented in this, I tried to put it into formats that are easy to understand and relate to!

I'm a Certified Ophthalmic Technician/Surgical Assistant with over 25 years of experience. I am at times required to fill out patient's DMV forms stating their visual function levels, so I am very familiar with the standards!

Most everybody knows that 20/20 vision is the accepted level for normal good vision, but what you may NOT know is that you are NOT required to have 20/20 vision to DRIVE! The standards of vision in Best Corrected/wearing glasses values for driving across the USA are as follows:

20/40 vision and a peripheral field of vision of 100 degrees to have the ability to drive at NIGHT.

20/70 vision and a peripheral field of vision of 70 degrees to be allowed to drive in the DAYTIME.

Now the kicker...this is ONLY ONE EYE!! A person does not need to even have a second eye!!

Commercial/CDL licenses DO require 20/40 best corrected in BOTH EYES, and 100 degrees of peripheral vision.

Some examples. A healthy person's field of vision is appx. 180 degrees, from left ear to right ear when looking straight ahead.
Below is a view taken at a local intersection just standing in the driving lane. Apologies for quality, I don't have a PANARAMIC camera, so there are defects in the Splicing, but you can get the IDEA!

Now from INSIDE the Car:

Now just showing the view to the left from the car, note the TREES, Signal Light Pole, Power Line Poles, etc.!!


Here's a view pulling up to the crosswalk of the intersection.

Now a zoomed in view, do you see the bike yet? It's on the sidewalk, but a full block away!


Now, just a few examples of comparing the view/size of a standard SUV...my Xterra and my bike! Again, didn't want to have bike sitting wayout in road next to car, so I did some splicing!
First, view at 50 feet away.

Now 100 feet away.

Now 200 feet away.


And below is a shot of my bike below a standard Speed Limit Sign. The size of the lettering for the words Speed Limit are ~4" tall, which is just a bit over the 20/200 size lettering we use for vision exams, and this photo was taken at 200 feet, 5Mp Camera at full resolution, and then when I zoomed in on the actual image, the words Speed Limit were illegible, so looks like my camera doesn't quite have 20/20 vision, but close!
Below image has been reduced in res/size for posting.

Continued in part 2
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Forum Jump


All times are GMT -6. The time now is 01:58 AM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Integrated by BBpixel ©2004-2022, jvbPlugin