Tag Archives: school zone

school zone tag for Eltec

Antennas Mounted on Water Towers Support School’s IP Time Clocks

The school zone flashing beacons in Longview, Texas (pop 85,000) used a paging system to program school signals. Keith Covington, Traffic Signal Supervisor, determined the system “limited us, not only communicating with the clocks but monitoring the clocks”. ELTEC’s SYSTEM 3000 was chosen to centrally program, manage, and monitor each TC-3000 IP time clock (36 total).

Eltec System 3000

Eltec’s SYSTEM 3000 was chosen to centrally program, manage, and monitor school zone signals in 36 locations. A LANG 3000 was mounted at the top of three local water towers.

After reviewing available communication options to the Traffic Center from each LANG 3000 (gateway), it was determined to use the Water Department’s Ethernet connections. By utilizing three water towers, “reaching all our areas without spending a lot of money and without having a monthly bill” was doable according to Keith.

The water tower Ethernet connection is located at base of each tower. To avoid coax signal loss, LANG 3000’s (enclosed in a small cabinet) were installed on the top of the water towers. CAT 5 cable from the tower base to the top provides power and data communication. Doing so eliminated approximately 100 feet of coax cable ensuring maximum transmit power at the antenna. The 1 watt, 900 MHz spread spectrum radio didn’t lose signal strength by doing it this way.

After installing four gateways, one of the LANGs could not ‘see’ one school’s beacons due to hills and trees. Locating the fourth LANG to an intersection controller cabinet with a fiber connection, enabled them to utilize the system’s repeater capability resolving the problem. Two intermediate clocks were programmed to create and support a communication pathway. According to Keith “by installing the LANG in the intersection controller cabinet in the area of communication difficulty, the redirection of repeating signals (clock to clock) came easily when trying to maintain communication back to the Traffic Center.”

The DLPRO 3000 software is “easy to use and user-friendly.” He continues, “Having the capability to connect and monitor each clock individually and quickly determines if lights are flashing with great accuracy. It’s a valuable tool of communication compared to the old system.” Monitoring all clocks at a glance is also an option with the Background Monitor function. With the former paging system, “you couldn’t validate if lights where flashing or not without going directly to the site or someone reporting it.” The SYSTEM 3000 “allows the opportunity to fix problems before they are noticed by the public through the DLPRO 3000 monitoring feature in the software.”

Contact ELTEC at 800.227.1745; sales@elteccorp.com; ELTEC or your local ELTEC Dealer for a SYSTEM 3000 analysis and quote.

Reprinted with permission from IMSA.

Solutions for Spot Devices’ School Beacons (IMSA Jan/Feb ’15)

When the SIMA software service was discontinued, remote communication and programming to Spot Devices’ school zones systems was no longer possible; nor was there a means for programming at the pole. For the MODOT (Missouri) Southwest District, ELTEC designed a cost-effective solution while salvaging as many parts as possible. Specifically, the cabinet, battery, charge controller, solar panel, and beacon were reused.

A voltage booster circuit was integrated inside ELTEC’s TC- 18 programmable time clock. The circuit board converts the 5 VDC solar panel and battery to 12 VDC powering the TC-18 time clock and LED. By simply mounting the clock inside the cabinet and connecting four wires, MODOT was back in business.

All TC-18 time clocks include a built-in DC flasher and operate on either AC or DC (solar). The keypad allows direct on- site programming, but it is computer programmable using the DLPRO 18 Software.

Every TC-18 is upgradable to become a TC-3000 time clock, an IP/network clock for remote programming and communication. All Spot Devices’ school zone systems have the option of being retrofitted with the TC-3000.

For more information or a quote on a Spot Devices retrofit: Phone: 800.227.1745;  Email sales@elteccorp.com or contact your local ELTEC Dealer ELTECCORP.