Information on transportation issues and identified trends: 

• continuing increase in demand for transportation; 
• population increases and urbanization increase traffic flows
• traffic congestion; 
• saving energy, reducing greenhouse gases and reducing wasted mileage on the streets
   

Programmable controllers and LED lights can improve communications and monitor/measure and adapt to traffic congestion.
 

LED Indicators and signs

• Status indicators on a variety of equipment are used which include traffic lights/signals, Exit signs, Railroad crossing signals, Continuity indicators and Elevator push-button Lighting . 
• Thin, lightweight message displays at airports and railway stations, and as destination displays for trains, buses, trams, and ferries. 
• Red or yellow LEDs are used in indicator and alphanumeric displays in environments where night vision must be retained: aircraft cockpits, submarine and ship bridges, and military field use. 
• Red, yellow, green, and blue LEDs can be used for model railroading applications and BLUE LEDs on traffic signals to identify traffic violations!
• Because of their long life and fast switching times, , but many high-end vehicles are now starting to use LEDs for their entire rear light clusters.  
• White LED headlamps -the significant improvement in the time taken to light up (perhaps 0.5s faster than an incandescent bulb) improves safety by giving drivers more time to react.  

Besides the gain in reliability, LEDs have styling advantages because they are capable of forming much thinner lights than incandescent lamps with parabolic reflectors.