Which is it? 4 or 6 inches?

Ok guys time to fess up! The space between a double yellow line is supposed to be what?......I'm guessing either 4 or 6 inches.

Generally on a roadway it's 1 ft. here; however on a parking lot whatever they want I guess I have noticed on parking lots it seems the wider the space the more "skinny" the stalls themselves so... By the way, no one should ask Fonz's lady about this...she would say 6 but layout 4

Is this a trick question? 4" in between two 4" yellow.

In all seriousness around here in 22 years I have never been asked to do a new layout with double lines on a parking lot, just isn't called for around here for whatever reason; and the roadways have all spec'ed 12". On the restripe's I've noticed it just seems to be as I said, the smaller the stall, the wider the space between the double stripes, but never seen one only 4".

Opps!! I guess I failed to secify the details. I ment a double yellow line on a roadway. I just restriped 2 miles of double yellow line on roadway around a local factory. The space between the lines varried from 3 to 8 inches at times. I was wondering what the usual DOT specs were for most State Highways? I've seem them 4 and 6 inches. When I visited Randy V. a few years ago he informed me that the spaces between dashed lines in Michigan were 12 and a half feet of paint, then 37 and a half feet of space. I thought they might have some other quirky spec for double yellow lines I didn't know about too.

By the way Don, I always figured what the wife didn't know.....couldn't hurt her!!!...lol!

Well if she don't know the difference between 4" and 6" then you certainly couldn't hurt her. Around here it is 6" space between yellow lines on a city road. In parking lots I try to use 4" but it doesn't matter as long as it is constant.

Pennsylvania is 4" line 6" space 4" line

Wash state . county ,city is 4'' line 4'' space 4'' line. State uses 4'' line 12'' space 4'' line. but i restripe a lot of little cities who have no idea buy what there own people have done in the past , it may vary 6'' in 300 ft

CalTrans (California DOT) is 4-3-4, with 3" being the space between the yellow lines. Most all cities and counties follow this. Following your state's DOT would be playing it safe.

MUTCD [manual uniform traffic contol devices] says discernable distance between lines.i have found 4/4/4 workks well on roads with speed limits 35 or lower.MO has started using much wider lines on interstates,looks 6 or 8 inches wide.

Using two guns to stripe double centerline is most important.

Fonz. I think it depends on the speed limit as to what the length of the dashes are and the spaces in between. In other words the faster the speed limit the further the spaces can be apart.

I was told once, by an engineer the spec. was 12 on center for the 2 4 inch lines.

Coming from Fonz, I thought this was a question about something else.... Old school was 4" line, 4" gap, 4" line. Then came the advent of pavement markers. The raised snowplowable markers were originally installed so that their keels were in the lines on either side, but when it came time to restripe the roadway, the markers got painted. The engineers realized their error and decided to correct the problem, so they sent out a new spec for spacing. Some states went to 6" some to 8" and some even wider. So it can vary from state to state. On private property you can either stick with 4/4/4...or not. On roadways, local DOT specs should be followed. Round here (NC) some of the skip lines and edgelines on multilane highways have increased to an 8" width so that us old folks with our failing eyesight can pick out where the lanes are. Your tax dollars at work: NC has a pretty low snowfall, so raised snowplowable markers have fallen out of favor, except in the mountains and areas that actually get snow. We use "sun country" markers, which are cheap and easy to apply. Only problem is, when we do get snow, they all get removed by the plows. We get 4" of snow, and afterwards there are thousands of markers laying along the sides of the roads. Brilliant. And to compound the brilliance, the contract for the markers goes out right after the beginning of the fiscal year, (July 1) so the markers usually start getting put down about September 1, which means they may only last until December.

Just for 2 cents I had to do a bunch of driving in Ft. Worth yesterday so I took some notes on parking lots I happened by... spaces in "the middle" varied just like I said, a minimum of about 4" to about 12" on others on parking lots. 100% Agreed, every state has a "spec book" that will give your state's specs for double line spacing as well as skip lines (been a long time since I painted any, I remember never having realized they were so long with such big spaces) but our city doesn't use state specs. State uses long stripes with longer gaps..."looks right" at 50-70 the city always goes shorter & closer spaced which "looks right" at 30

Gary, the Michigan DOT spec for double yellow spacing is 12" center to center. A long line truck in MI must have a 3 gun setup for center line painting. The outside guns are set to 12" center of line with a gun in the middle for the skips when a double yellow changes to a solid/skip or just a skip. The skip line pattern in MI is still 12.5' line x 37.5' gap. There has been a change in some job specifications for a wider edge line marking rather than the old 4" markings but I have not seen the DOT typical drawing on this yet.

12" center to center.....So that leaves an eight inch space in the center..Correct Randy? I'm still amazed about the 12.5 x 37.5 skip lines you told me about Randy. My thanks to all who replied !! Thanks again, Fonz

Yes, 8" space between the inside edge of the lines.