School buses under threat
Students face being without school buses in the run-up to Junior and Leaving Certificate exams after Siptu announced plans for ballots on further strike action.
Drivers working on school runs are currently not engaged in the ongoing industrial dispute.
Bus Eireann provides transport for 10pc of all school services, so any further action will affect more than 10,000 youngsters in the weeks before crucial exams.
A ballot is due to be completed by April 21.
The union said it was taking the measure to protect drivers.
However, 115,000 primary and secondary school pupils travel on the School Transport Scheme everyday.
The result of the ballot could see the school bus drivers join striking colleagues on the picket line as parents scramble to make alternative arrangements before exams. The union said the ballot was being called because jobs were under threat due to a financial crisis at the firm.
The company lost more than €8m last year and admitted that insolvency before the summer is a prospect that it must consider.