And this doesn't just happen at congested intersections, it happens everywhere. Now I complain when my brother pulls up practically on the bumper of the car in front at a light, but a couple feet is usually the norm. A car length and a half is STUPID!
Mood necklaces or rings usually contain a chemical that changes color with heat (example cold to warmer black, purple, blue, green, reddish). They then usually have a pamphlet saying what the colors mean.
The answer to your question is When it comes to mood ring colors, red means excited, black means nervous, blue means calm, dark yellow means unsettled, gray means anxious, pink means fearful, orange means daring, brown means restless, bright yellow means imaginative, lavender means sensual, green means normal and white means frustrated.