Something I learned in a Law class, or was it government: You can't make a law if it is unenforceable. Every accident is avoidable if everyone involved had a clear head at all times. Sadly, humans are idiots, and Better Judgment is a luxury nowadays that not everyone desires to use. RE viesturs: What you talk of is Grade-Separation. If you are willing to pony up the cash for 2000ft long approaches and the bridge itself, plus perpetual maintenance, for all of the crossings across our 150,000 mile network, go right ahead. And RE Kris94 on your original point: If you think it has merit, take it to your local and other pertinent legislatures. That is what democracy is for; it doesn't work if you just sit here and complain about it.