gismo
Touchdown! Greaser!
While I don't know that it's universally true, many states allow crossing a solid yellow line to make a left turn onto of off of a road. This is definietly true in MN.
Driving In The USA And Canada - Left Turns Other Than At Intersections
The information on this page, although extensively checked and believed to be correct, is completely unofficial and is provided for general guidance purposes only. Introduction
In the USA and Canada vehicles drive on the right, so left turns usually involve crossing the path of oncoming traffic. Left Turns From Roads Into Driveways
On "fast food alleys", where numerous businesses each have their own parking lots, each with separate entrances and exits, it can be very difficult to judge where to turn left. In some towns the left turn lanes are separated from other lanes by concrete barriers, with gaps where vehicles can enter them. This is presumably a safety measure to avoid vehicles entering or leaving the left turn lanes suddenly. Judging which entrance to take can be difficult and a mistake is awkward to correct. If you do make a mistake then you must always continue on and never reverse in order to enter or leave such a lane.
Left Turns From Driveways Onto Roads
In the USA and Canada the parking lots (car parks) of many businesses such as gas stations (petrol stations), restaurants, shops and motels each have several entrances and exits. If you are leaving such a parking lot and will be turning left, it is always well worth taking a good look round for an alternative exit which may be much more convenient. For example, there may be a side or rear exit from the parking lot onto a minor road, which then has an intersection with the road you wish to join. Turning left from the minor road may be safer and easier than doing so directly from the parking lot.
Even better, there may be a side or rear exit onto a minor road which then has an intersection with the road you wish to join which is controlled by traffic lights, making the left turn much safer and easier.
Left Turns Across Double Yellow Lines
It is perfectly legal to make a left turn into or out of a driveway or entrance (for example into or out of a gas station or a car park outside a restaurant or a shop) on a stretch of road where there is a double yellow line. You must of course yield to oncoming traffic. The California Driver Handbook 2002 (external link verified Jul-02) says: "Two solid yellow lines mean 'no passing.' Never drive to the left of these lines. Stay on your side of the road. Exceptions: (1) When turning left at an intersection or into or out of a private road or driveway. (2) When the right half of the road is closed or blocked. (3) Some carpool lanes. Enter and exit at designated places only." (Page 22 - Use of Lanes) and has two clear statements: "You may cross a solid double yellow line to turn left" and: "You may cross a solid double yellow line to turn left. OK to cross double yellow to turn left. Do not cross double yellow to pass another vehicle." (Laws And Rules Of The Road - Road Markings; checked Jul-02).
The Oct-98 printed edition of the Illinois Driver's Manual "Rules Of The Road" says: "Solid yellow lines may be crossed to make a left turn to or from an alley, private road, driveway or street" (Chapter 8: Traffic Signals and Pavement Markings - Pavement Markings - Solid Double Yellow Lines).
The Massachusetts driving manual says: "Do NOT cross a double yellow line unless turning left." (Section 4: Pavement Markings - Yellow Lane Lines - Double Yellow Line: Both Solid; checked Jul-02).
According to the California Driver Handbook 2002 (external link verified Jul-02): "You may make a U-turn across a double yellow line, if the turn can be made safely and legally." (Laws And Rules Of The Road - Turns - Legal U-Turns; checked Jul-02)
By the way, the same rule seems to apply to turning right across double white lines in Britain (Britain drives on the left and uses white lines where yellow lines are used in the USA.) Paragraph 71 of the British Highway Code says: "Where there are double white lines along the road and the line nearer to you is solid, you must not cross or straddle it except when you need to get in and out of premises or a side road..."