You are protected by Federal law (Family Medical Leave Act) for 12 weeks. After that the company can do anything they like.
Did you stay in contact with your terminal manager while you were on leave? There have been exceptions to the 12 week leave where drivers came back without losing their position, but I think it's up to the terminal leaders.
Here's the FMLA rundown.
EMPLOYER COVERAGE
The FMLA applies to all public agencies, including state, local and federal employers, local education agencies (schools), and private-sector employers who employed 50 or more employees in 20 or more workweeks in the current or preceding calendar year, including joint employers and successors of covered employers.
EMPLOYEE ELIGIBILITY
To be eligible for FMLA benefits, an employee must:
* work for a covered employer;
* have worked for the employer for a total of 12 months;
* have worked at least 1,250 hours over the previous 12 months; and
* work at a location in the United States or in any territory or possession of the United States where at least 50 employees are employed by the employer within 75 miles.
While the 12 months of employment need not be consecutive, employment periods prior to a break in service of seven years or more need not be counted unless the break is occasioned by the employee’s fulfillment of his or her National Guard or Reserve military obligation (as protected under the Uniformed Services Employment and Reemployment Rights Act (USERRA)), or a written agreement, including a collective bargaining agreement, exists concerning the employer’s intention to rehire the employee after the break in service. See “FMLA Special Rules for Returning Reservists.”
LEAVE ENTITLEMENT
A covered employer must grant an eligible employee up to a total of 12 workweeks of unpaid leave during any 12-month period for one or more of the following reasons:
* for the birth and care of a newborn child of the employee;
* for placement with the employee of a son or daughter for adoption or foster care;
* to care for a spouse, son, daughter, or parent with a serious health condition;
* to take medical leave when the employee is unable to work because of a serious health condition; or
* for qualifying exigencies arising out of the fact that the employee’s spouse, son, daughter, or parent is on active duty or call to active duty status as a member of the National Guard or Reserves in support of a contingency operation.