Any concerns you have about travelling to and from work should be discussed with your manager and options explored to accommodate your concerns as far as reasonably practical.
If you cannot work from home and you have to travel to work, you should cycle or walk wherever possible in line with Government guidance.
If you rely on public transport to get to and from work (i.e. no bike or car) and feel anxious about using it at peak times or the area you live in has a reduced service again discuss this with your manager to explore other options such as flexibility in start and finish times if possible.
The following links may be helpful:
If you are travelling to and from work by car, you must not car-share with anyone outside your household and ensure when you park you allow for adequate physical distancing measures to be adhered to.