Roadway incursion alert system

An apparatus for generating incursion alerts for receipt by remote receiving devices that annunciate the alerts to personnel, comprising:

• an impact detector configured to generate an alert signal in response to impact;
• a transmitter configured for transmitting said alert signal to a remote receiver;
• and
• a power switch configured for activating power to said apparatus in response to sensing of a minimum level of ambient light and maintaining power to said apparatus until said sensed ambient light falls below a minimum level for a predetermined period of time.

An apparatus for generating an incursion alert for remotely warning roadway personnel to an incursion risk, comprising:

• an impact detector configured to generate an incursion event signal in response to impact;
• a transmitter coupled to said impact detector and configured for transmitting said incursion alert signal to a remote receiver for annunciation of said impact;
• and
• a receiver coupled to said transmitter;
• wherein said receiver is configured to receive alert signals from one or more remote transmitters and pass received alert signals to said transmitter for retransmission to one or more remote receivers to extend the transmission range of said one or more remote transmitters;
• means for locking out said receiver for a predetermined period of time upon retransmission of said alert signal;
• and
• a power switch configured for activating power to said apparatus in response to sensing of a minimum level of ambient light and maintaining power to said apparatus until said sensed ambient light falls below a minimum level for a predetermined period of time.

An apparatus for alerting personnel to remote traffic incursion events, comprising:

• means for detecting an incursion event and generating an incursion signal;
• a validation circuit configured to filter out an incursion signal for a non-incursion event;
• means for transmitting an alert signal for remote annunciation in response to an incursion signal from said validation circuit;
• and
• power activation means for activating power to said apparatus in response to sensing of a minimum level of ambient light and maintaining power to said apparatus until said sensed ambient light falls below a minimum level for a predetermined period of time.

An apparatus for alerting personnel to remote traffic incursion events, comprising:

• means for detecting an incursion event and generating an impact signal;
• means for transmitting an alert signal for remote annunciation in response to said impact signal;
• and
• an automatic power switch configured to activate said apparatus in response to sensing of a minimum level of ambient light and maintaining power to said apparatus until said sensed ambient light falls below a minimum level for a predetermined period of time.